Debt (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
2018 Notes
Dec. 31, 2012
2018 Notes
Nov. 05, 2012
2018 Notes
Apr. 10, 2012
2018 Notes
Dec. 31, 2013
Revolving credit facility
Dec. 31, 2012
Revolving credit facility
Dec. 31, 2013
Vehicle Financings
Dec. 31, 2012
Vehicle Financings
Dec. 31, 2013
Amended Revolving Credit Facility
Debt Instrument [Line Items]                      
Maturity Date Description                 Various [1]    
Interest Rate 3.30%   9.875% [2]   9.875% 9.875%     3.30% [1]   4.61% [3]
Maturity Date     2018-04 [2]               2017-11 [3]
Unamortized Deferred Financing Costs $ 20,806 $ 24,400 $ 14,691 [2]               $ 6,115 [3]
Long term debt 555,946 567,037 400,000 [2] 400,000 [2]     135,990 [3] 146,990 [3] 19,956 [1] 20,047 [1]  
Original issue discount (1,084) [4] (1,277) [4]                  
Original issue premium 315 [4] 366 [4]                  
Total debt, net 555,177 566,126                  
Less: current portion (5,464) (4,699)                  
Total long-term debt $ 549,713 $ 561,427                  
[1] Vehicle financings consist of installment notes payable and capital lease arrangements related to fleet purchases with a weighted-average annual interest rate of approximately 3.30%, which mature in varying installments between 2014 and 2017. Installment notes payable and capital lease obligations were $1.1 million and $18.8 million, respectively, at December 31, 2013 and $2.1 million and $17.9 million, respectively, at December 31, 2012.
[2] The interest rate presented represents the coupon rate on the Company's outstanding $400 million aggregate principal amounts of 9.875% Senior Notes due 2018 (the "2018 Notes"), excluding the effect of deferred financing costs, original issue discounts and original issue premiums. Including the effect of these items, the effective interest rate on the 2018 Notes is approximately 11.0%.
[3] The interest rate presented represents the interest rate on the $325.0 million senior secured revolving credit facility (the "Revolving Credit Facility") at December 31, 2013.
[4] The issuance discount represents the unamortized difference between the $250.0 million aggregate principal amount of the 2018 Notes issued in April 2012 and the proceeds received upon issuance (excluding interest and fees). The issuance premium represents the unamortized difference between the proceeds received in connection with the November 2012 issuance of the 2018 Notes (excluding interest and fees) and the $150.0 million aggregate principal amount thereunder.