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Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
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 $ 29,027    
Liability for unrecognized tax benefits 39,011 $ 31,877 $ 60,538
Increase in liability for unrecognized tax benefits 7,134    
Accrued interest and penalties related to unrecognized tax benefits, net of federal tax benefits 9,918 $ 10,123  
Domestic Tax Authority      
Income Taxes [Line Items]      
Net operating loss carryforwards $ 182,200    
Net operating loss carryforwards, expiration beginning year 2028    
Domestic Tax Authority | Maximum      
Income Taxes [Line Items]      
Net operating loss carryforwards, expiration year 2035    
State      
Income Taxes [Line Items]      
Net operating loss carryforwards $ 761,686    
State | Maximum      
Income Taxes [Line Items]      
Net operating loss carryforwards, expiration year 2035    
Foreign Tax Authority      
Income Taxes [Line Items]      
Net operating loss carryforwards $ 96,847