Entity Central Index Key Document and entity information. Document And Entity Information [Abstract] Entities [Table] Entities [Table] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Class A common stock Common Class A [Member] Class B common stock Common Class B [Member] Class U common stock. Class U common stock Common Class U [Member] Document Information [Line Items] Document Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well Known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity Public Float Entity Public Float Statement Of Financial Position [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] ASSETS Assets [Abstract] Current assets Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Trade receivables, net of allowance for doubtful accounts of $2,550 and $3,040 (including related parties of $7,357 and $5,534) Accounts Receivable Net Current Prepaid expenses and other current assets (including related parties of $274 and $274) Prepaid Expense And Other Assets Current Total current assets Assets Current Property and equipment, net of accumulated depreciation of $204,343 and $198,282 Property Plant And Equipment Net Intangible assets subject to amortization, net of accumulated amortization of $81,770 and $78,234 (including related parties of $11,598 and $13,918) Finite Lived Intangible Assets Net Intangible assets not subject to amortization Indefinite Lived Intangible Assets Excluding Goodwill Goodwill Goodwill Deferred income taxes Deferred Tax Assets Liabilities Net Noncurrent Other assets Other Assets Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities And Stockholders Equity [Abstract] Current liabilities Liabilities Current [Abstract] Current maturities of long-term debt Long Term Debt Current Accounts payable and accrued expenses (including related parties of $3,886 and $3,909) Accounts Payable And Accrued Liabilities Current Total current liabilities Liabilities Current Long-term debt, less current maturities, net of unamortized debt issuance costs of $2,365 and $3,226 Long Term Debt Noncurrent Other long-term liabilities Other Liabilities Noncurrent Total liabilities Liabilities Commitments and contingencies (note 11) Commitments And Contingencies Stockholders' equity Stockholders Equity [Abstract] Common stock Common Stock Value Additional paid-in capital Additional Paid In Capital Common Stock Accumulated deficit Retained Earnings Accumulated Deficit Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income Loss Net Of Tax Total stockholders' equity Stockholders Equity Total liabilities and stockholders' equity Liabilities And Stockholders Equity Related Party Related Party Transactions By Related Party [Axis] Related Party Related Party [Domain] Related parties. Related Parties Related Parties [Member] Trade receivables, allowance for doubtful accounts Allowance For Doubtful Accounts Receivable Current Trade receivables, related parties Accounts Receivable Related Parties Current Prepaid expenses and other current assets Property and equipment, accumulated depreciation Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Accumulated amortization of Intangible assets Finite Lived Intangible Assets Accumulated Amortization Intangible assets subject to amortization, net Accounts payable and accrued expenses Unamortized debt issuance costs Unamortized Debt Issuance Expense Common stock, par value Common Stock Par Or Stated Value Per Share Common stock, shares authorized Common Stock Shares Authorized Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Corporate expenses. Common stock dividends per share declared basic. Common stock dividends per share declared diluted. Income Statement [Abstract] Net revenue Revenues Expenses: Operating Expenses [Abstract] Cost of revenue - digital media Cost Of Revenue Direct operating expenses (including related parties of $10,302, $9,306, and $10,655) (including non-cash stock-based compensation of $1,330, $1,931, and $1,294) Direct Operating Costs Selling, general and administrative expenses Selling General And Administrative Expense Corporate expenses (including non-cash stock-based compensation of $3,705, $3,309, and $3,057) Corporate Expenses Depreciation and amortization (includes direct operating of $9,206, $10,326, and $10,037; selling, general and administrative of $4,735, $4,219, and $3,847; and corporate of $1,401, $1,444, and $779) (including related parties of $2,320, $2,321, and $2,320) Depreciation And Amortization Impairment charge Asset Impairment Charges Total expenses Operating Expenses Operating income Operating Income Loss Interest expense Interest Expense Interest income Investment Income Interest Loss on debt extinguishment Gains Losses On Extinguishment Of Debt Income (loss) before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax (expense) benefit Income Tax Expense Benefit Net income Net Income Loss Basic and diluted earnings per share: Earnings Per Share [Abstract] Net income per share, basic Earnings Per Share Basic Net income per share, diluted Earnings Per Share Diluted Cash dividends declared per common share, basic Common Stock Dividends Per Share Declared Basic Cash dividends declared per common share, diluted Common Stock Dividends Per Share Declared Diluted Weighted average common shares outstanding, basic Weighted Average Number Of Shares Outstanding Basic Weighted average common shares outstanding, diluted Weighted Average Number Of Diluted Shares Outstanding Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Direct Operating Expenses Direct Operating Expenses Direct Operating Expenses [Member] Corporate expenses. Corporate Expenses Corporate Expenses [Member] Selling, General and Administrative Expenses Selling General And Administrative Expenses [Member] Direct operating expenses Non-cash stock-based compensation Share Based Compensation Depreciation and amortization Statement Of Income And Comprehensive Income [Abstract] Net income Other comprehensive income (loss), net of tax: Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Change in fair value of interest rate swap agreements Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax Total other comprehensive income (loss) Other Comprehensive Income Loss Net Of Tax Comprehensive income Comprehensive Income Net Of Tax Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Common Stock Common Stock [Member] Treasury Stock Treasury Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income [Member] Balance, Beginning Balance, Beginning, Shares Issuance of common stock upon exercise of stock options or awards of restricted stock units Stock Issued During Period Value Stock Options Exercised Issuance of common stock upon exercise of stock options or awards of restricted stock units, Shares Stock Issued During Period Shares Stock Options Exercised Tax payments related to shares withheld for share-based compensation plans Adjustments Related To Tax Withholding For Share Based Compensation Stock-based compensation expense Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Class B common stock exchanged for Class A common stock Stock Issued During Period Shares Conversion Of Convertible Securities Repurchase of Class A common stock Stock Repurchased During Period Value Repurchase of Class A common stock, Shares Stock Repurchased During Period Shares Retirement of treasury stock Stock Repurchased And Retired During Period Value Retirement of treasury stock, Shares Stock Repurchased And Retired During Period Shares Dividends paid Dividends Balance, Ending Balance, Ending, Shares Amortization of syndication contracts. Payments on syndication contracts. Payment of contingent consideration. Cash payments for. Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities Continuing Operations [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Deferred income taxes Deferred Income Tax Expense Benefit Amortization of debt issuance costs Amortization Of Financing Costs Amortization of syndication contracts Amortization Of Syndication Contracts Payments on syndication contracts Payments On Syndication Contracts (Gain) loss on debt extinguishment Changes in assets and liabilities: Increase Decrease In Operating Capital [Abstract] (Increase) decrease in trade receivables Increase Decrease In Accounts Receivable (Increase) decrease in prepaid expenses and other current assets Increase Decrease In Prepaid Deferred Expense And Other Assets Increase (decrease) in accounts payable, accrued expenses and other liabilities Increase Decrease In Accounts Payable And Accrued Liabilities Net cash provided by operating activities Net Cash Provided By Used In Operating Activities Continuing Operations Cash flows from investing activities: Net Cash Provided By Used In Investing Activities Continuing Operations [Abstract] Purchases of property and equipment and intangibles Payments To Acquire Productive Assets Purchase of a business, net of cash acquired Payments To Acquire Businesses Net Of Cash Acquired Purchases of short term investments: CDs Payments To Acquire Short Term Investments Proceeds from short term investments: CDs Proceeds From Maturities Prepayments And Calls Of Shortterm Investments Purchases of investments Payments To Acquire Longterm Investments Net cash used in investing activities Net Cash Provided By Used In Investing Activities Continuing Operations Cash flows from financing activities: Net Cash Provided By Used In Financing Activities Continuing Operations [Abstract] Proceeds from stock option exercises, net Proceeds From Stock Options Exercised Payments on long-term debt Repayments Of Long Term Debt Dividends paid Payments Of Dividends Repurchase of Class A common stock Payments For Repurchase Of Common Stock Payment of contingent consideration Payment Of Contingent Consideration Net cash used in financing activities Net Cash Provided By Used In Financing Activities Continuing Operations Net increase (decrease) in cash and cash equivalents Cash And Cash Equivalents Period Increase Decrease Cash and cash equivalents: Cash And Cash Equivalents At Carrying Value [Abstract] Beginning Ending Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Cash payments for: Cash Payments For [Abstract] Interest Interest Paid Net Income taxes Income Taxes Paid Net Supplemental disclosures of non-cash investing and financing activities: Noncash Investing And Financing Items [Abstract] Capital expenditures financed through accounts payable, accrued expenses and other liabilities Capital Expenditures Incurred But Not Yet Paid Organization Consolidation And Presentation Of Financial Statements [Abstract] Nature of Business Nature Of Operations Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Business Combinations [Abstract] Acquisitions Mergers Acquisitions And Dispositions Disclosures [Text Block] Goodwill And Intangible Assets Disclosure [Abstract] Goodwill and Other Intangible Assets Goodwill And Intangible Assets Disclosure [Text Block] Property Plant And Equipment [Abstract] Property and Equipment Property Plant And Equipment Disclosure [Text Block] Payables And Accruals [Abstract] Accounts Payable and Accrued Expenses Accounts Payable And Accrued Liabilities Disclosure [Text Block] Debt Disclosure [Abstract] Long-Term Debt Long Term Debt [Text Block] Derivative Instruments And Hedging Activities Disclosure [Abstract] Derivative Instruments Derivative Instruments And Hedging Activities Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Measurement Inputs Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Equity [Abstract] Stockholders' Equity Stockholders Equity Note Disclosure [Text Block] Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] Equity Incentive Plans Disclosure Of Compensation Related Costs Share Based Payments [Text Block] Related Party Transactions [Abstract] Related-Party Transactions Related Party Transactions Disclosure [Text Block] Accumulated Other Comprehensive Income (Loss) Comprehensive Income Note [Text Block] Litigation Legal Matters And Contingencies [Text Block] Segment Reporting [Abstract] Segment Data Segment Reporting Disclosure [Text Block] Quarterly Financial Information Disclosure [Abstract] Quarterly Results of Operations Quarterly Financial Information [Text Block] Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Valuation And Qualifying Accounts [Abstract] Schedule II - Consolidated Valuation and Qualifying Accounts Schedule Of Valuation And Qualifying Accounts Disclosure [Text Block] Basis of Consolidation and Presentation Consolidation Policy [Text Block] Variable Interest Entities Consolidation Variable Interest Entity Policy Use of Estimates Use Of Estimates Cash and Cash Equivalents Cash And Cash Equivalents Policy [Text Block]