Debt - Additional Information (Detail) (New Term Loan Credit Agreement [Member], USD $) In Thousands, unless otherwise specified	1 Months Ended	9 Months Ended
	Feb. 28, 2014	Sep. 30, 2014
Debt Instrument [Line Items]
Pricing option #1 for term loan credit agreement		1/2 of 1%
Pricing option #2 for term loan credit agreement	1.00%
Pricing option #3 for term loan credit agreement	2.00%
Decreased LIBOR floor rate	1.00%
Costs incurred during initial issuance of the debt, write-off		$ 1,649
Additional cost of debt issuance, to be amortized over the life of debt	15,626
Net original issuance discount, recorded in other expense		642
Remainder of the discount, to be amortized over the life of the debt	6,087
Call premium recorded in other expense, net		698
Banker and legal fees, recorded in other expense, net		1,407
Banker and legal fees incurred by company		1,555
Premium amortized over the life of the debt	6,611
Cost amortized over the life of the debt	148
Principal amount on repayment of loans	$ 1,110,966
Alternate Base Interest Rate Loans [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	2.25%
Basis spread on variable rate	2.00%
LIBOR [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Basis spread on variable rate	3.25%