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Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) (USD $)
3 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
7.75% Senior Secured Notes due 2019 [Member]
Guarantors
Dec. 31, 2013
7.75% Senior Secured Notes due 2019 [Member]
Sep. 30, 2014
Secured Term Loan [Member]
Sep. 30, 2014
Amended Working Capital Revolver [Member]
Debt Instrument [Line Items]                
Percentage of Senior Secured Notes         7.75% 7.75%    
Amended maximum amount of revolving credit facility               $ 100,000,000
Maturity date         Aug. 01, 2019     Apr. 13, 2018
Amount available for borrowing               74,200,000
Offering date         Aug. 07, 2013      
Aggregate principal amount of notes sold         425,000,000      
Number of unsecured guarantors         2      
Repayment of outstanding borrowings             67,200,000  
Loss on extinguishment of debt    $ (1,296,000)    $ (1,296,000)     $ 1,300,000