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 $2,183 at January 31 and $2,092 at July 31 Inventory, Net Total inventories Inventories, net Deferred Tax Assets, Net, Current Deferred income taxes 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 Investments and Other Noncurrent Assets 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 Tax Liabilities, Net, Noncurrent 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 January 31 - 46,073,596 shares, outstanding January 31 - 41,702,185 shares; issued July 31 - 45,913,154 shares, outstanding July 31 - 41,604,359 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) income Treasury Stock, Value Treasury Stock, at cost; January 31 - 4,371,411 shares at cost; July 31 - 4,308,795 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, 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 services 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 services 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, Extraordinary Items, 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 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 loss Other comprehensive 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 Financing 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 assets acquired and liabilities assumed: 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 Acquisitions 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 Proceeds from Stock Options Exercised Proceeds from exercises of stock options 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 Represents the description of the basis of the financial statement presentation and also the entire disclosure for significant events that occurred after the balance sheet date through the date financial statements were issued or the date financial statements were available to be issued. Basis of Presentation and Subsequent Events Disclosure [Text Block] Basis of Presentation Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Acquisitions Business Combination Disclosure [Text Block] Acquisitions Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Recent Accounting Pronouncements Inventories 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 (Loss) Income Comprehensive Income (Loss) Note [Text Block] Accumulated other comprehensive (loss) income Operating Segments Segment Reporting Disclosure [Text Block] Operating Segments Disposition of Business Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Disposition of Business Legal Proceedings Legal Matters and Contingencies [Text Block] Legal Proceedings 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 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] Weighted-average assumptions used to estimate fair value of stock options granted using the Black-Scholes option valuation model Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of stock option activity Schedule of Business Acquisitions, by Acquisition [Table] 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 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 remainder for fiscal 2016 and 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. Schedule of Effective Income Tax Rate Reconciliation, Between Periods [Table Text Block] Reconciliation of consolidated effective income tax rate Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Schedule of aggregate annual required payments over the remaining fiscal year, the next four 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 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 Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Income tax benefits 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] Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Restricted Stock [Member] Restricted shares 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 [Line Items] Stock-Based Compensation 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, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of Shares