Long-Term Debt - 2013 Credit Facility - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended					12 Months Ended			1 Months Ended	12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Aug. 02, 2013	May 31, 2013	Dec. 31, 2013 2013 Credit Facility [Member]	Aug. 02, 2013 2013 Credit Facility [Member]	May 31, 2013 2013 Credit Facility [Member]	May 31, 2013 Term Loan A [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Term Loan B [Member]	May 31, 2013 Term Loan B [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Senior Secured Revolving Credit Facility [Member] 2013 Credit Facility [Member]	May 31, 2013 Senior Secured Revolving Credit Facility [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Senior Secured Revolving Credit Facility [Member] 2013 Credit Facility [Member] Base Rate Margin [Member]	Dec. 31, 2013 Senior Secured Revolving Credit Facility [Member] 2013 Credit Facility [Member] LIBOR Margin [Member]	Dec. 31, 2013 Term Loan B Facility [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Term Loan B Facility [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Term Loan [Member] 2013 Credit Facility [Member]	Dec. 31, 2013 Term Loan [Member] 2013 Credit Facility [Member] Base Rate Margin [Member]	Dec. 31, 2013 Term Loan [Member] 2013 Credit Facility [Member] LIBOR Margin [Member]
Debt Instrument [Line Items]
Senior Secured debt						$ 405,000,000				$ 20,000,000		$ 375,000,000		$ 30,000,000
Maturity date of revolving credit facility		May 31, 2013								Aug. 01, 2013			May 31, 2018				May 31, 2020	May 31, 2020
Additional borrowing capacity									100,000,000
Effective interest rate							3.50%
Variable interest rate basis spread on debt															1.50%	2.50%				1.50%	2.50%
Interest rate on borrowings under 2013 Credit Facility													If a Base Rate Loan, one and one half percent (1.50%) per annum and (B) if a LIBOR Rate Loan, two and one half percent (2.50%) per annum;						If a Base Rate Loan, one and one half percent (1.50%) per annum and (ii) if a LIBOR Rate Loan, two and one half percent (2.50%) per annum;
Period considered for applicability of repricing fees																	6 months	6 months
Percentage of Repricing Fee							1.00%
Certain customary events of default, number of business days to default in the payment of interest on borrowings							3 days
Certain customary events of default, number of days default continue for compliance with other agreement							30 days
Certain customary events of default, number of days default continue for financial statement delivery obligations							10 days
Certain customary events of default ,indebtedness aggregate amount							15,000,000
Certain customary events of default ,failure in payment of final judgments aggregate amount							15,000,000
Certain customary events of default ,failure in payment of final judgments aggregate amount period							30 days
Principal amount repurchased	16,200,000			16,200,000	324,000,000
Redemption price on principal amount with net proceeds, accrued and unpaid expense								106.563%
Gain (loss) on debt extinguishment	400,000	(29,675,000)	(3,743,000)	(423,000)
Prepayment to reduce loans outstanding under Term Loan B facility											10,000,000
Carrying value of term loan																	364,100,000
Estimated fair value of term loan																	$ 364,100,000