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Derivatives - Additional Information (Detail) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Apr. 30, 2007
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Derivative [Line Items]      
Hedging ineffectiveness was recorded in earnings $ 0 $ 0  
Estimated gain reclassified from other comprehensive income (loss) to earnings as contracts settle (646,000) (1,753,000)  
Number of interest rate swaps     6
Reclassification OCI to interest expense related to the derivatives gross of tax 4,000,000    
Reclassification OCI to interest expense related to the derivatives net of tax 2,000,000    
Early redemption option on secured senior notes 40.00%    
Contingent call option price, Percentage 108.50%    
Call feature, Description Embedded Derivative Related to Senior Secured Notes-The 2019 Notes (see Note 7, Debt) include a contingent call option to redeem up to 40% of the notes in the event of an equity offering at a rate of 108.50%, until May 15, 2015.    
Interest rate swap contracts [Member]
      
Derivative [Line Items]      
Interest rate derivative instruments not designated as hedging instruments at fair value, net 8,000,000    
Accumulated Unrealized gain (loss) on derivatives 7,000,000    
Scenario, Forecast [Member]
      
Derivative [Line Items]      
Estimated gain reclassified from other comprehensive income (loss) to earnings as contracts settle $ 4,000,000