The Company and Significant Accounting Policies - Additional Information 1 (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended					12 Months Ended			12 Months Ended			3 Months Ended			3 Months Ended					3 Months Ended		3 Months Ended				3 Months Ended				3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2011	Mar. 31, 2014 Interest Rate Swap Agreements Interest_Rate_Swaps	Mar. 31, 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	Mar. 31, 2014 2013 Credit Facility	Sep. 30, 2013 2013 Credit Facility	May 31, 2013 2013 Credit Facility	Mar. 31, 2014 2013 Credit Facility Term Loan	Mar. 31, 2014 2013 Credit Facility Term Loan Base Rate Margin	Mar. 31, 2014 2013 Credit Facility Term Loan LIBOR Margin	Mar. 31, 2014 2013 Credit Facility Term Loan B Facility	May 31, 2013 2013 Credit Facility Term Loan B Facility	Mar. 31, 2014 2013 Credit Facility Senior Secured Revolving Credit Facility	May 31, 2013 2013 Credit Facility Senior Secured Revolving Credit Facility	Mar. 31, 2014 2013 Credit Facility Senior Secured Revolving Credit Facility Base Rate Margin	Mar. 31, 2014 2013 Credit Facility Senior Secured Revolving Credit Facility LIBOR Margin	Mar. 31, 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	Mar. 31, 2014 2013 Credit Facility Term Loans B	Mar. 31, 2014 8.75% Senior Secured First Lien Notes	Mar. 31, 2014 8.75% Senior Secured First Lien Notes Prior to August 1, 2013 Term One	Mar. 31, 2014 8.75% Senior Secured First Lien Notes Prior to August 1, 2013, Term Two	Mar. 31, 2014 8.75% Senior Secured First Lien Notes Prior to August 1, 2013 Term Three	Mar. 31, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2013, Term Four	Mar. 31, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2014, Term Four	Mar. 31, 2014 8.75% Senior Secured First Lien Notes Twelve Months Beginning August 1, 2015, Term Four	Mar. 31, 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	$ 0	$ 0.1
Senior Secured debt										405.0	50.0								375.0		30.0				20.0
2012 Credit Facility, obligations							20.0	3.0			30.0
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														100.0
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												15.0
Certain customary events of default ,failure in payment of final judgments aggregate amount												15.0
Certain customary events of default ,failure in payment of final judgments aggregate amount period												30 days
Principal amount repurchased			16.2																							324.0
Gain (loss) on debt extinguishment			(0.4)																							(29.7)
Carrying value of term loan																											363.1
Estimated fair value of term loan																											363.1
Repayment of loans																										10.0
Interest rate swap inception date				Dec. 16, 2013
Number of forward-starting swap agreements				3
Aggregated notional amount of interest swap agreements				186.0
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					186.0
Change in fair value of interest rate				0.6
Unrealized gains or losses included in accumulated other comprehensive income				0
Fair value of interest rate	$ 0.7