Document and Entity Information Statement [Table] Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus CONDENSED CONSOLIDATED BALANCE SHEETS Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Accounts Receivable, Net, Current Accounts receivable, net of allowance for doubtful accounts of $1,854 at April 30 and $1,850 at July 31 Inventory, Net Total inventories Inventories, net Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Assets, Current Total current assets Property, Plant and Equipment, Net Property and equipment, net Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Net Goodwill Balance at the end of the period Balance at the beginning of the period Goodwill Other Assets, Noncurrent Other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and stockholders' equity Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Employee-related Liabilities, Current Compensation payable Accrued Liabilities, Current Accrued expenses Deferred Revenue, Current Deferred revenue Accrued Income Taxes, Current Income taxes payable Liabilities, Current Total current liabilities Long-term Debt, Excluding Current Maturities Long-term debt Deferred Income Tax Liabilities, Net Deferred income taxes Other Liabilities, Noncurrent Other long-term liabilities Commitments and Contingencies. Commitments and contingencies Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Issued Preferred Stock, par value $1.00 per share; authorized 1,000,000 shares; none issued Common Stock, Value, Issued Common Stock, par value $.10 per share; authorized 75,000,000 shares; issued April 30 - 46,182,454 shares, outstanding April 30 - 41,724,048 shares; issued July 31 - 46,084,047 shares, outstanding July 31 - 41,708,214 shares Additional Paid in Capital, Common Stock Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive (loss) Treasury Stock, Common, Value Treasury Stock, at cost; April 30 - 4,458,406 shares at cost; July 31 - 4,375,833 shares at cost Stockholders' Equity Attributable to Parent Balance Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Allowance for Doubtful Accounts Receivable, Current Accounts receivable, allowance for doubtful accounts (in dollars) Preferred Stock, Par or Stated Value Per Share Preferred Stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred Stock, authorized shares Preferred Stock, Shares Issued Preferred Stock, shares issued Common Stock, Par or Stated Value Per Share Common Stock, par value (in dollars per share) Common Stock, Shares Authorized Common Stock, authorized shares Common Stock, Shares, Issued Common Stock, shares issued Common Stock, Shares, Outstanding Common Stock, shares outstanding Treasury Stock, Common, Shares Treasury Stock, shares CONDENSED CONSOLIDATED STATEMENTS OF INCOME Revenue, Net [Abstract] Net sales Sales Revenue, Goods, Net Product sales Sales Revenue, Services, Net Product service Revenue, Net Net sales Total net sales Cost of Goods and Services Sold [Abstract] Cost of sales Cost of Goods Sold Product sales Cost of Services Product service Cost of Goods and Services Sold Total cost of sales Gross Profit Gross profit Operating Expenses [Abstract] Expenses: Selling Expense Selling General and Administrative Expense General and administrative Research and Development Expense Research and development Operating Expenses Total operating expenses Operating Income (Loss) Operating income Income from operations Interest Expense Interest expense Investment Income, Interest Interest income Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income before income taxes Income Tax Expense (Benefit) Income taxes Net Income (Loss) Attributable to Parent Net income Net income Earnings Per Common Share Earnings per common share: Earnings Per Share, Basic Basic (in dollars per share) Basic earnings per share (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Diluted earnings per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividends per common share (in dollars per share) CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Foreign currency translation Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total other comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Depreciation Depreciation Amortization of Intangible Assets Amortization Amortization expense Share-based Compensation Stock-based compensation expense Amortization of Debt Issuance Costs Amortization of debt issuance costs Gain (Loss) on Disposition of Property Plant Equipment Loss on disposal of fixed assets Amount of expense (income) related to adjustment to fair value of acquisition related liabilities. Fair Value Adjustment of Acquisition Related Liabilities Fair value adjustments to acquisition related liabilities The increase (decrease) in cash flows from operations resulting from changes in deferred taxes. Deferred Income Tax Expense (Benefit) Cash Flow Deferred income taxes Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefits from stock-based compensation Increase (Decrease) in Operating Capital [Abstract] Changes in assets and liabilities, net of effects of business acquisitions: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and other current liabilities Increase (Decrease) in Income Taxes Income taxes Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities Payments to Acquire Productive Assets Capital expenditures Proceeds from Sale of Property, Plant, and Equipment Proceeds from disposal of fixed assets Payments to Acquire Businesses, Net of Cash Acquired Acquisition of businesses, net of cash acquired Payments for (Proceeds from) Other Investing Activities Other, net Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities Proceeds from Lines of Credit Borrowings under revolving credit facility Repayments of Lines of Credit Repayments under revolving credit facility Repayment of borrowings under credit agreement Payments of Ordinary Dividends, Common Stock Dividends paid Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefits from stock-based compensation Payments for Repurchase of Common Stock Purchases of treasury stock Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by financing activities Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of exchange rate changes on cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Decrease in cash and cash equivalents Basis of Presentation Business Description and Basis of Presentation [Text Block] Basis of Presentation Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Recent Accounting Pronouncements Acquisitions Business Combination Disclosure [Text Block] Acquisitions Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Inventories, Net Inventory Disclosure [Text Block] Inventories, net Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivatives Fair Value Measurements Fair Value Disclosures [Text Block] Fair Value Measurements Intangible Assets and Goodwill Goodwill and Intangible Assets Disclosure [Text Block] Intangible Assets and Goodwill Warranties Product Warranty Disclosure [Text Block] Warranties Financing Arrangements Debt Disclosure [Text Block] Financing Arrangements Earnings Per Share [Text Block] Earnings Per Common Share Income Taxes Income Tax Disclosure [Text Block] Income Taxes Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Accumulated other comprehensive income (loss) Information as to Operating Segments and Foreign and Domestic Operations Segment Reporting Disclosure [Text Block] Information as to Operating Segments and Foreign and Domestic Operations Legal Proceedings Legal Matters and Contingencies [Text Block] Legal Proceedings Summary of Significant Accounting Policies New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Represents information pertaining to the acquisition of Accutron, Inc. Accutron Inc [Member] Accutron, Inc. Business Acquisition [Line Items] Acquisitions Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of purchase price allocated to the assets acquired and assumed liabilities based on estimated fair values Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Performance Shares [Member] Performance Share Units Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of the income statement components of stock-based compensation expense recognized in the Condensed Consolidated Statements of Income Tabular disclosure of the significant assumptions used during the year to estimate the fair value of equity instruments other than options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] Schedule of assumptions used to estimate fair value of performance share units Schedule of Nonvested Share Activity [Table Text Block] Summary of nonvested stock award activity Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of weighted-average assumptions used to estimate fair value of stock options Schedule of Inventory, Current [Table Text Block] Summary of inventories Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of fair values of financial instruments measured on a recurring basis Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Reconciliation of liabilities measured and recorded at fair value on a recurring basis using significant unobservable inputs (Level 3) Schedule of Intangible Assets and Goodwill [Table Text Block] Schedule of intangible assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of estimated amortization expense of intangible assets for the next five years Schedule of Goodwill [Table Text Block] Schedule of changes in goodwill Schedule of Product Warranty Liability [Table Text Block] Summary of activity in warranty reserves Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of computation of basic and diluted EPS available to stockholders of common stock (excluding participating securities) Schedule of Weighted Average Number of Shares [Table Text Block] Schedule of reconciliation of weighted average number of shares and common stock equivalents attributable to common stock to the Company's total weighted average number of shares and common stock equivalents including participating securities Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the current fiscal period and the prior year fiscal period from continuing operations. ScheduleOfEffectiveIncomeTaxRateReconciliationBetweenPeriodsTableTextBlock Reconciliation of consolidated effective income tax rate between periods Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Schedule of aggregate annual required payments over the next five years and thereafter under contractual obligations that have long-term components Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of the components and changes in accumulated other comprehensive (loss) income Schedule of Segment Reporting Information, by Segment [Table Text Block] Information as to operating segments Number of Operating Segments Number of operating segments New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Type Of Adoption [Member] Type of Adoption [Domain] Accounting Standards Update 2016-09 Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. Accounting Standards Update201609 [Member] ASU 2016-09 Share-Based Payment Accounting New Accounting Pronouncement, Early Adoption [Axis] New Accounting Principles Early Adoption [Member] New Accounting Principles, Early Adoption [Domain] New Accounting Pronouncement Early Adoption Effect [Member] New Accounting Pronouncement, Early Adoption, Effect New Accounting Pronouncements or Change in Accounting Principle [Line Items] Recent Accounting Pronouncements Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Income tax benefits/Excess tax benefits Reduction of income tax expense Represents information pertaining to the acquisition of endoscopy-related assets from CR Kennedy & Company Pty Ltd. Endoscopy Related Assets [Member] CR Kennedy & Company Pty Ltd. Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period Pre-acquisition annual revenues Represents the cash consideration paid to shareholders of the acquired entity excluding the acquisition-related costs of the acquisition. Business Acquisition Cost Of Acquired Entity Purchase Price Excluding Acquisition Related Costs Total consideration for the transaction, excluding acquisition-related costs Represents information pertaining to the acquisition of Vantage Endoscopy Inc. Vantage Endoscopy Inc [Member] Vantage Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships [Member] Customer relationships Technology Based Intangible Assets [Member] Technology Trade Names [Member] Brand names Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract] Net Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets Current assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Property, plant and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Amortizable intangible assets Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Deferred income tax assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Net assets acquired Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Amortizable intangible assets, useful life Represents the number of in-process research and development projects acquired in connection with the acquisition. Number of in Process Research and Development Projects Acquired Number of in-process research and development projects acquired Business Acquisition, Goodwill, Expected Tax Deductible Amount Goodwill deductible for income tax purposes Represents information pertaining to the acquisition of North American Science Associates Inc. North American Science Associates Inc [Member] North American Science Associates Inc Represents information pertaining to Medical Innovations Group Holdings Limited and certain affiliated companies (collectively, "MI"). Medical Innovations Ltd [Member] Medical Innovations Group Holdings Limited Entity Number of Employees Number of individuals in employee base Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost Of Sales [Member] Cost of sales Selling And Marketing Expense [Member] Operating expenses: Selling General And Administrative Expense [Member] Operating expenses: General and administrative Research And Development Expense [Member] Operating expenses: Research and development Operating Expense [Member] Total operating expenses Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Income statement components of stock-based compensation expense recognized in Consolidated Statements of Income Allocated Share-based Compensation Expense Stock-based compensation before income taxes The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period before adjustments. Employee Service Share-based Compensation, Tax Benefit from Compensation Expense, Before Adjustments Income tax benefits, before excess tax benefit adjustment Allocated Share-based Compensation Expense, Net of Tax Total stock-based compensation expense, net of tax Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-Based Compensation Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Stock-based awards, additional disclosure The reduction during the period in income taxes payable due to the satisfaction of certain criteria when share-based awards are exercised or vested. Reduction in Income Taxes Payable Due to Share Based Awards, Exercised or Vested Deduction in income tax due to exercise of options and vesting of restricted stock (in dollars) The amount of income tax deductions generated in the current period related to share-based compensation recorded in prior periods in income tax expense over the equity awards’ vesting period. Income Tax Benefit from Share-based Compensation, Recorded in Prior Periods Income tax deductions previously recorded in income tax expense over the equity awards’ vesting period Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Increase in additional paid-in capital due to excess tax benefit on stock-based compensation expense Shares or units awarded to employees for meeting performance targets based on stockholder return. Performance Shares Stockholder Return [Member] TSR-Based Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period The percentage of maximum attainment of initial grant . Percentage of Maximum Attainment of Initial Grant Maximum attainment of initial grant (as a percent) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Total unrecognized stock-based compensation expense, before income taxes, related to total nonvested stock options and stock awards (in dollars) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Remaining weighted average period over which unrecognized stock-based compensation expense is expected to be recognized Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Weighted-Average Black-Scholes Option Valuation Assumptions Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility (as a percent) Volatility of common stock The estimated measure of the percentage by which the share price of the entity's peer companies are expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Peer Companies Average volatility of peer companies The estimated measure of the average correlation coefficient of peer companies of the entity. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Average Correlation Coefficient, Peer Companies Average correlation coefficient of peer companies Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate (as a percent) Restricted Stock [Member] Restricted Stock Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Nonvested stock awards at the end of the period (in shares) Nonvested stock awards at the beginning of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted Average Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Nonvested stock awards at the end of the period (in dollars per share) Nonvested stock awards at the beginning of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Cancelled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) An arrangement whereby an employee or member of the Board of Directors is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Employee And Directors Stock Options [Member] Stock options Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend yield (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected lives Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Stock options, additional disclosure Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average fair value of all options granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercises of options (in shares) Inventory, Raw Materials and Purchased Parts, Net of Reserves Raw materials and parts Inventory, Work in Process, Net of Reserves Work-in-process Inventory, Finished Goods, Net of Reserves Finished goods Inventory Valuation Reserves Reserve for excess and obsolete inventory Derivative [Table] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Foreign Exchange Contract [Member] Foreign currency forward contracts Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Designated As Hedging Instrument [Member] Designated as hedging instrument Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Fair Value Hedging [Member] Fair value hedge instruments Derivative [Line Items] Derivatives Derivative, Average Remaining Maturity Term of contracts Derivative, Number of Instruments Held Number of contracts Derivative, Notional Amount Notional value of contracts Derivative, Term of Contract Term of renewed contracts Cumulative Translation Adjustment, Net of Tax, Period Increase (Decrease) Net currency conversion losses, net of tax Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value Inputs Level3 [Member] Level 3 Measurement Frequency [Axis] Fair Value Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Measurements Recurring [Member] Recurring basis Represents information pertaining to Jet Prep Ltd. Jet Prep Ltd [Member] Jet Prep Ltd. Represents information pertaining to PuriCore International Limited, renamed Cantel Medical UK Limited. Puri Core International Limited [Member] Cantel Medical (UK) Liability Class [Axis] Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain] Fair Value by Liability Class [Domain] Liability recognized arising from contingent consideration in a business combination. Contingent Consideration Liability [Member] Contingent Consideration Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis The amount of guaranteed obligation arising from an inherited contingency (as defined) which has been recognized as of the acquisition date. Business Combination, Contingent Guaranteed Obligation Contingent guaranteed obligation Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Total net unrealized (gains) losses included in general and administrative expense in earnings Increase (decrease) in contingent guaranteed obligation Fair Value Inputs, Discount Rate Discount rate of cash flow projections (as a percent) Discount rate of potential payments (as a percent) Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability Assumed contingent obligation Fair Value Inputs Level1 [Member] Level 1 Cash and Cash Equivalents [Axis] Restricted Cash And Cash Equivalents Cash And Cash Equivalents [Member] Cash and Cash Equivalents [Domain] Money Market Funds [Member] Money markets Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Cash And Cash Equivalents [Member] Cash and cash equivalents Accrued Liabilities [Member] Accrued expenses Other Noncurrent Liabilities [Member] Other long-term liabilities Assets, Fair Value Disclosure [Abstract] Assets: Cash and Cash Equivalents, Fair Value Disclosure Money markets Assets, Fair Value Disclosure Total assets Liabilities, Fair Value Disclosure [Abstract] Liabilities: The amount of liability arising from an inherited contingency (as defined) which has been recognized as of the acquisition date that is expected to be paid during the following twelve months or within one business cycle, if longer. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability, Current Assumed contingent obligation The amount of guaranteed obligation arising from an inherited contingency (as defined) which has been recognized as of the acquisition date that is expected to be paid during the following twelve months or within one business cycle, if longer. Business Combination, Contingent Guaranteed Obligation, Current Contingent guaranteed obligation Accrued Liabilities, Fair Value Disclosure Total accrued expenses The amount of liability arising from an inherited contingency (as defined) which has been recognized as of the acquisition date due after one year or beyond the normal operating cycle, if longer. Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability, Noncurrent Assumed contingent obligation The amount of guaranteed obligation arising from an inherited contingency (as defined) which has been recognized as of the acquisition date, due after one year or beyond the normal operating cycle, if longer. Business Combination, Contingent Guaranteed Obligation, Noncurrent Contingent guaranteed obligation Other Liabilities, Fair Value Disclosure Total other long-term liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Total liabilities Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Liability arising from an inherited contingency (as defined) which has been recognized as of the acquisition date. Contingent Assumed Obligation [Member] Assumed contingent liability Represents contingent guaranteed obligations. Contingent Guaranteed Obligation [Member] Contingent guaranteed obligation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Reconciliation of Level 3 liability Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Reconciliation of liability measured and recorded at fair value on a recurring basis using Level 3 Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Ending balance Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss) Foreign currency translation Asset Impairment Charges Impairment of long-lived assets, including goodwill and intangibles with indefinite lives Schedule of Finite-Lived Intangible Assets [Table] Noncompete Agreements [Member] Non-compete agreements Exclusive legal right granted by the government to the owner of the patent to exploit an invention or a process for a period of time specified by law and other registrations. Patents And Other Registrations [Member] Patents and other registrations Range [Axis] Range [Member] Range [Domain] Minimum [Member] Minimum Maximum [Member] Maximum Weighted Average [Member] Weighted average Finite-Lived Intangible Assets [Line Items] Intangible assets with finite lives: Finite-Lived Intangible Asset, Useful Life Estimated useful lives Finite-Lived Intangible Assets, Gross Gross Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Amortization Finite-Lived Intangible Assets, Net Net Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract] Intangible assets with indefinite lives: Indefinite-Lived Intangible Assets (Excluding Goodwill) Trademarks and tradenames Intangible Assets, Net (Excluding Goodwill) [Abstract] Total intangible assets Intangible Assets, Gross (Excluding Goodwill) Gross Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Estimated annual amortization expense of intangible assets for next five years Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Three month period ending July 31, 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2021 Amount of amortization expense expected to be recognized during the sixth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Finite Lived Intangible Assets Amortization Expense Year Six 2022 Schedule of Goodwill [Table] Segments [Axis] Segment [Domain] Segments [Domain] Represents the Endoscopy (formerly known as Endoscope Reprocessing) segment of the reporting entity. Endoscopy [Member] Endoscopy Represents the Water Purification and Filtration segment of the reporting entity. Water Purification And Filtration [Member] Water Purification and Filtration Represents the Healthcare Disposables segment of the reporting entity. Healthcare Disposables [Member] Healthcare Disposables Represents the Dialysis segment of the reporting entity. Dialysis [Member] Dialysis Goodwill [Line Items] Goodwill Goodwill [Roll Forward] Changes in Goodwill Goodwill, Acquired During Period Acquisitions Goodwill, Foreign Currency Translation Gain (Loss) Foreign currency translation Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Summary of activity in warranty reserves Standard and Extended Product Warranty Accrual Ending balance Beginning balance Standard and Extended Product Warranty Accrual, Additions from Business Acquisition Acquisitions Standard and Extended Product Warranty Accrual, Increase for Warranties Issued Provisions Standard and Extended Product Warranty Accrual, Decrease for Payments Settlements Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss) Foreign currency translation Schedule of Long-term Debt Instruments [Table] Other Assets [Member] Other assets Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Line Of Credit [Member] Credit Agreement Revolving Credit Facility [Member] Revolving Credit Facility Foreign Line Of Credit [Member] Borrowings of foreign currency Letter Of Credit [Member] Letters of credit Swing line loans available under the credit agreement. These loans reduce the amount available under the revolving line of credit. Swing Line Loans [Member] Swing line loans Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Base Rate [Member] Lender's base rate London Interbank Offered Rate L I B O R [Member] LIBOR Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event Debt Instrument [Line Items] Financing Arrangements Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity Debt Instrument, Term Term of line of credit facility Represents the maximum additional borrowing capacity available at the entity's option under the revolving credit facility, subject to the satisfaction of certain conditions precedent. Line of Credit Facility, Maximum Additional Borrowing Capacity Maximum additional borrowing capacity available at the entity's option Payments of Debt Issuance Costs Debt issuance costs Debt Issuance Costs, Noncurrent, Net Unamortized debt issuance costs Debt Instrument, Basis Spread on Variable Rate Margin on reference rate (as a percent) Represents the reference rate used to compute the variable rate on the debt instrument. Debt Instrument Reference Rate Reference rate (as a percent) Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Fees on unused portion of credit facilities (as a percent) Represents the percentage of shares of the foreign subsidiaries of the entity pledged as security under the credit agreement terms. Line of Credit Facility, Percentage of Shares of Foreign Subsidiaries, Pledged as Security Shares of foreign subsidiaries pledged as security (as a percent) Long-term Debt Outstanding borrowings Total Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Numerator for basic and diluted earnings per share: Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Less income allocated to participating securities, basic Net Income (Loss) Available to Common Stockholders, Basic Net income available to common shareholders, basic Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Less income allocated to participating securities, diluted Net Income (Loss) Available to Common Stockholders, Diluted Net income available to common shareholders, diluted Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Denominator for basic and diluted earnings per share, as adjusted for participating securities: Reconciliation of weighted average number of shares and common stock equivalents attributable to common stock, to the entity's total weighted average number of shares and common stock equivalents, including participating securities Weighted Average Number of Shares Outstanding, Basic Denominator for basic earnings per share - weighted average number of shares outstanding attributable to common stock Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Dilutive effect of stock options using the treasury stock method and the average market price for the period (in shares) Weighted Average Number of Shares Outstanding, Diluted Denominator for diluted earnings per share - weighted average number of shares and common stock equivalents attributable to common stock Denominator for diluted earnings per share - weighted average number of shares and common stock equivalents attributable to common stock Earnings Per Share, Basic and Diluted [Abstract] Earnings per share attributable to common stock: Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights Participating securities (in shares) This element represents the total weighted average number of shares and common stock equivalents attributable to both common stock and participating securities. Weighted Average Number of Diluted Shares, Outstanding Attributable to Common Stock and Participating Securities Total weighted average number of shares and common stock equivalents attributable to both common stock and participating securities Disclosures pertaining to income taxes. Income Tax [Table] Income Tax [Line Items] Income Taxes - Income tax reconciliation Effective Income Tax Rate Reconciliation, Percent Consolidated effective income tax rate (as a percent) Percentage of the difference between reported income tax expense (benefit) in current fiscal period and prior year fiscal period from continuing operations attributable to excess tax benefits. Effective Income Tax Rate Reconciliation, Between Periods, Excess Tax Benefits, Percent Excess tax benefits Percentage of the difference between reported income tax expense (benefit) in current fiscal period and prior year fiscal period from continuing operations attributable to acquisition. Effective Income Tax Rate Reconciliation, Between Periods, Acquisition Related Acquisition related items, net Percentage of the difference between reported income tax expense (benefit) in current fiscal period and prior year fiscal period from continuing operations outside of the country of domicile. Effective Income Tax Rate Reconciliation, Between Periods, Foreign Income Tax Rate Differential, Percent International operations Percentage of the difference between reported income tax expense (benefit) in current fiscal period and prior year fiscal period from continuing operations attributable to other adjustments. Effective Income Tax Rate Reconciliation, Between Periods, Other Adjustments, Percent Other Schedule of long-term contractual obligations under contractual arrangements. Long Term Contractual Obligations [Table] Other Commitments [Axis] Other Commitments [Domain] Other Commitments [Domain] Represents the agreements listing the terms for an executive for leaving his position from the entity in the event of exit from or disposal of business activities or restructurings pursuant to a plan or otherwise. Compensation Agreements [Member] Compensation agreements Represents other long-term obligations. Other Long Term Obligations [Member] Other long-term obligations No definition available. Long Term Contractual Obligations [Line Items] Long-Term Contractual Obligations Commitments and Contingencies Long-term Debt, Fiscal Year Maturity [Abstract] Maturity of the credit facility Long-term Debt, Maturities, Repayments of Principal in Year Three 2019 No definition available. Long-term Debt, Interest Payments Due, Fiscal Year Maturity [Abstract] Expected interest payments under the credit facility Amount of interest payments due on long-term debt in the remainder of the fiscal year following the latest fiscal year. Long-term Debt, Interest Payments, Remainder of Fiscal Year Remaining fiscal year Amount of interest payments due on long-term debt in the second fiscal year following the latest fiscal year. Long-term Debt, Interest Payments, Due in Two Years 2018 Amount of interest payments due on long-term debt in the third fiscal year following the latest fiscal year. Long-term Debt, Interest Payments, Due in Three Years 2019 Amount of interest payments due on long-term debt. Long-term Debt, Interest Payments Due Total Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Minimum commitments under noncancelable operating leases Operating Leases, Future Minimum Payments, Remainder of Fiscal Year Remaining fiscal year Operating Leases, Future Minimum Payments, Due in Two Years 2018 Operating Leases, Future Minimum Payments, Due in Three Years 2019 Operating Leases, Future Minimum Payments, Due in Four Years 2020 Operating Leases, Future Minimum Payments, Due in Five Years 2021 Operating Leases, Future Minimum Payments, Due Thereafter Thereafter Operating Leases, Future Minimum Payments Due Total Other Commitment, Fiscal Year Maturity [Abstract] Other commitments Other Commitments, Future Minimum Payments, Remainder of Fiscal Year Remaining fiscal year Other Commitment, Due in Second Year 2018 Other Commitment, Due in Third Year 2019 Other Commitment, Due in Fourth Year 2020 Other Commitment, Due in Fifth Year 2021 Other Commitment, Due after Fifth Year Thereafter Other Commitment Total Contractual Obligation, Fiscal Year Maturity [Abstract] Total contractual obligations Represents the amount of contractual obligation maturing in the remainder of the fiscal year following the latest fiscal year ended. Contractual Obligation Due in Remainder of Fiscal Year Remaining fiscal year Contractual Obligation, Due in Second Year 2018 Contractual Obligation, Due in Third Year 2019 Contractual Obligation, Due in Fourth Year 2020 Contractual Obligation, Due in Fifth Year 2021 Contractual Obligation, Due after Fifth Year Thereafter Contractual Obligation Total Long-term Debt, Weighted Average Interest Rate Weighted average interest rate on outstanding borrowings (as a percent) Represents information pertaining to the acquisition of International Medical Services S.r.l. International Medical Services Srl [Member] International Medical Service S.r.l. Counterparty Name [Axis] Repurchase Agreement Counterparty Name [Domain] Counterparty Name [Domain] Represents Central Bank of Italy. Central Bank Of Italy [Member] Central bank of Italy Primary financial statement caption encompassing current accrued liabilities. Accrued Liabilities Current [Member] Accrued expenses Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Liabilities assumed Debt Instrument, Interest Rate, Effective Percentage Interest rate per annum (as a percent) Accumulated Other Comprehensive Income (Loss) [Table] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income Accumulated Translation Adjustment [Member] Foreign Currency Translation Adjustments Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent, Net of Tax [Roll Forward] Components and changes in accumulated other comprehensive (loss) income OCI, before Reclassifications, Net of Tax, Attributable to Parent Other comprehensive loss for foreign currency translation Concentration Risk [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue Segment [Member] Segment sales Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk [Member] Customer concentration Customer [Axis] Name Of Major Customer [Domain] Customer [Domain] Represents information pertaining to two customers of the entity. Two Customers [Member] Two customers Represents information pertaining to four customers of the entity. Four Customers [Member] Four customers Concentration Risk [Line Items] Concentration risk Represents the number of customers contributing to a percentage of the net sales revenue of the segment. Concentration Risk Number of Customers Number of customers accounting for a percentage of segment net sales Concentration Risk, Percentage Concentration risk within segment (as a percent) Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segment Corporate Non Segment [Member] General corporate Segment Reporting Information [Line Items] Information as to operating segments Interest Income (Expense), Net Interest expense, net Represents a share based compensation award with vesting based on length of service. Stock Awards Vesting Based On Service [Member] Time-Based Awards Shares or units awarded to employees for meeting performance targets based on budgeted revenue and defined gross profit percentage. Performance Shares Budgeted Revenue [Member] Sales-Based