The Company and Significant Accounting Policies - Additional Information 1 (Detail) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended		12 Months Ended			12 Months Ended			9 Months Ended		9 Months Ended					9 Months Ended		9 Months Ended				3 Months Ended	9 Months Ended	0 Months Ended		9 Months Ended
	Sep. 30, 2013	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2014 Interest Rate Swap Agreements Interest_Rate_Swaps	Sep. 30, 2014 Interest Rate Swap Agreements Interest_Rate_Swaps	Sep. 30, 2014 Floating LIBOR -Based Interest Interest Rate Swap Agreements	Dec. 31, 2012 2012 Credit Facility	May 31, 2013 2012 Credit Facility	Dec. 20, 2012 2012 Credit Facility	Dec. 31, 2012 Term Loan	Dec. 20, 2012 Term Loan	Dec. 20, 2012 Letter of Credit	Sep. 30, 2014 2013 Credit Facility	May 31, 2013 2013 Credit Facility	Sep. 30, 2014 2013 Credit Facility Term Loan	Sep. 30, 2014 2013 Credit Facility Term Loan Base Rate Margin	Sep. 30, 2014 2013 Credit Facility Term Loan LIBOR Margin	Sep. 30, 2014 2013 Credit Facility Term Loan B Facility	May 31, 2013 2013 Credit Facility Term Loan B Facility	Sep. 30, 2014 2013 Credit Facility Senior Secured Revolving Credit Facility	May 31, 2013 2013 Credit Facility Senior Secured Revolving Credit Facility	Sep. 30, 2014 2013 Credit Facility Senior Secured Revolving Credit Facility Base Rate Margin	Sep. 30, 2014 2013 Credit Facility Senior Secured Revolving Credit Facility LIBOR Margin	Sep. 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	Sep. 30, 2014 2013 Credit Facility Term Loans B	Jul. 27, 2010 8.75% Senior Secured First Lien Notes	Sep. 30, 2014 8.75% Senior Secured First Lien Notes	Sep. 30, 2014 8.75% Senior Secured First Lien Notes Prior to August 1, 2013 Term One	Sep. 30, 2014 8.75% Senior Secured First Lien Notes Prior to August 1, 2013, Term Two	Sep. 30, 2014 8.75% Senior Secured First Lien Notes Prior to August 1, 2013 Term Three	Sep. 30, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2013, Term Four	Sep. 30, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2014, Term Four	Sep. 30, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2015, Term Four	Sep. 30, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2016, Term Four
Accounting Policies [Line Items]
Issuance price as percentage of principal amount																													98.722%		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	$ 0		$ 300,000
Senior Secured debt									405,000,000	50,000,000										375,000,000		30,000,000				20,000,000
2012 Credit Facility, obligations										30,000,000		20,000,000	3,000,000
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	(29,404,000)	400,000	(29,534,000)																								(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	3
Aggregated notional amount of interest swap agreements					186,000,000	186,000,000
Derivative average Interest rate					2.73%	2.73%
Derivative fixed Interest rate					5.23%	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					500,000	(1,300,000)
Fair value of interest rate				$ 1,700,000