v2.4.1.9
Income Taxes - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Line Items]      
Increase in valuation allowance related to changes in the estimated tax benefit of federal and state operating losses of separate-return entities $ 12,807us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount    
Liability for unrecognized tax benefits 31,877us-gaap_UnrecognizedTaxBenefits 60,538us-gaap_UnrecognizedTaxBenefits 67,546us-gaap_UnrecognizedTaxBenefits
Decrease in liability for unrecognized tax benefits 28,661us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease    
Unrecognized tax benefits due to change of accounting method 27,427us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit    
Accrued interest and penalties related to unrecognized tax benefits, net of federal tax benefits 10,123us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 10,742us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued  
Domestic Tax Authority      
Income Taxes [Line Items]      
Net operating loss carryforwards 203,282us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		    
Net operating loss carryforwards, expiration beginning year 2028    
Domestic Tax Authority | Maximum      
Income Taxes [Line Items]      
Net operating loss carryforwards, expiration year 2034    
State      
Income Taxes [Line Items]      
Net operating loss carryforwards 568,286us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		    
State | Maximum      
Income Taxes [Line Items]      
Net operating loss carryforwards, expiration year 2034    
Foreign Tax Authority      
Income Taxes [Line Items]      
Net operating loss carryforwards $ 55,436us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember