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Income Taxes (Narrative) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Expense Benefit [Line Items]      
Total current benefit (expense) $ (24,566) $ (36,353) $ 3,668
Income Tax Expense (Benefit), Continuing Operations [Abstract]      
Reduction to current tax expense 35,400   67,300
Valuation Allowance Recorded 339,800 143,500  
Total deferred benefit (33,923) 158,170 304,611
Deferred Tax Assets Net Current Classification [Abstract]      
Current net deferred tax assets included in net deferred tax liabilities 37,800 52,000  
Net deferred tax liabilities 1,526,095 1,485,853  
Foreign deferred tax liabilities 13,600 19,800  
Foreign net operating loss carryforwards 153,000    
Deferred Tax Assets Operating Loss Carryforwards Components [Abstract]      
Net operating loss carryforwards (tax effected) 1,300,000    
Deferred tax assets related to stock-based compensation expense included in net deferred tax liabilities 28,900    
Foreign income before taxes 97,200 48,300 84,000
Income Tax Reconciliation Tax Settlements [Abstract]      
Settlement of U.S. Federal and state tax examinations $ 28,900 $ 20,200 $ 60,600
Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued [Abstract      
Effective tax rate (8.00%) 17.00% 43.00%
Interest and penalties accrued related to unrecognized tax benefits $ 40,800 $ 49,400  
Total unrecognized tax benefits and accrued interest and penalties 147,700 178,800  
Portion of unrecognized tax benefits, interest and penalties recorded in "Other long-term liabilities" 110,400 131,000  
Noncurrent portion of unrecognized tax benefits netted against deferred tax assets 35,000 36,100  
Unrecognized tax benefits that would impact effective tax rate 68,800 100,100  
Portion of unrecognized tax benefits included in "Accrued Expenses" 2,300 $ 11,600  
Federal and State Net Operating Losses [Member]      
Valuation Allowance [Abstract]      
Valuation Allowance 487,100    
Foreign Net Operating Loss Carryforwards [Member]      
Valuation Allowance [Abstract]      
Valuation Allowance 146,400    
Other Foreign Deferred Tax Assets [Member]      
Valuation Allowance [Abstract]      
Valuation Allowance $ 22,100