The Company and Significant Accounting Policies - Additional Information 1 (Detail) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended		12 Months Ended			12 Months Ended			6 Months Ended		6 Months Ended					6 Months Ended		6 Months Ended				3 Months Ended	6 Months Ended			6 Months Ended
	Jun. 30, 2013	Dec. 31, 2011	Jun. 30, 2013	Jun. 30, 2014	Mar. 31, 2014 Interest Rate Swap Agreements	Jun. 30, 2014 Interest Rate Swap Agreements Interest_Rate_Swaps	Jun. 30, 2014 Floating LIBOR -Based Interest Interest Rate Swap Agreements	Dec. 31, 2012 Term Loan	Dec. 20, 2012 Term Loan	Dec. 20, 2012 Letter of Credit	Dec. 31, 2012 2012 Credit Facility	May 31, 2013 2012 Credit Facility	Dec. 20, 2012 2012 Credit Facility	Jun. 30, 2014 2013 Credit Facility	May 31, 2013 2013 Credit Facility	Jun. 30, 2014 2013 Credit Facility Term Loan	Jun. 30, 2014 2013 Credit Facility Term Loan Base Rate Margin	Jun. 30, 2014 2013 Credit Facility Term Loan LIBOR Margin	Jun. 30, 2014 2013 Credit Facility Term Loan B Facility	May 31, 2013 2013 Credit Facility Term Loan B Facility	Jun. 30, 2014 2013 Credit Facility Senior Secured Revolving Credit Facility	May 31, 2013 2013 Credit Facility Senior Secured Revolving Credit Facility	Jun. 30, 2014 2013 Credit Facility Senior Secured Revolving Credit Facility Base Rate Margin	Jun. 30, 2014 2013 Credit Facility Senior Secured Revolving Credit Facility LIBOR Margin	Jun. 30, 2014 2013 Credit Facility Term Loan A	May 31, 2013 2013 Credit Facility Term Loan A	Dec. 31, 2013 2013 Credit Facility Term Loans B	Jun. 30, 2014 2013 Credit Facility Term Loans B	Jun. 30, 2014 8.75% Senior Secured First Lien Notes	Jun. 30, 2014 8.75% Senior Secured First Lien Notes Prior to August 1, 2013 Term One	Jun. 30, 2014 8.75% Senior Secured First Lien Notes Prior to August 1, 2013, Term Two	Jun. 30, 2014 8.75% Senior Secured First Lien Notes Prior to August 1, 2013 Term Three	Jun. 30, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2013, Term Four	Jun. 30, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2014, Term Four	Jun. 30, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2015, Term Four	Jun. 30, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2016, Term Four
Accounting Policies [Line Items]
Rate on priority on principal amount with net proceeds at redemption																														10.00%	35.00%
Redemption price on principal amount with net proceeds, accrued and unpaid expense																											106.563%			103.00%	108.75%	100.00%	106.563%	104.375%	102.188%	100.00%
Rate on principal amount outstanding																															65.00%
Redemption closing date																															60 days
Redemption of Notes upon change in control, amount as percentage of principal amount including interest																													101.00%
Redemption of Notes declaration of acceleration written percentage of principal amount																													25.00%
Interest expense related to amortization of the bond discount	$ 100,000		$ 300,000
Senior Secured debt												405,000,000	50,000,000							375,000,000		30,000,000				20,000,000
2012 Credit Facility, obligations									20,000,000	3,000,000			30,000,000
Period of revolving credit facility								4 years
Maturity date of revolving credit facility											Dec. 20, 2016								May 31, 2020		May 31, 2018				Aug. 01, 2013
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 (ii) 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 (B) if a LIBOR Rate Loan, two and one half percent (2.50%) per annum;
Period considered for applicability of repricing fees																												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																									324,000,000
(Gain) loss on debt extinguishment	130,000	(400,000)	130,000																								29,700,000
Repayment of loans																											10,000,000
Carrying value of term loan																												362,200,000
Estimated fair value of term loan																												362,200,000
Interest rate swap inception date						Dec. 16, 2013
Number of forward-starting swap agreements						3
Aggregated notional amount of interest swap agreements						186,000,000
Derivative average Interest rate						2.73%
Derivative fixed Interest rate						5.23%
Interest rate swap effective date						Dec. 31, 2015
Interest rate swap expiration date						Dec. 31, 2018
Outstanding LIBOR-based debt							186,000,000
Change in fair value of interest rate					1,100,000	1,800,000
Fair value of interest rate				$ 2,500,000