Components of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Intangible Assets by Major Class [Line Items]
Definite-lived intangibles, gross amount	$ 216,875	$ 222,364
Intangibles, gross amount	249,015	254,504
Definite-lived intangibles, accumulated amortization	(37,245)	(25,338)
Intangibles, accumulated amortization	(37,245)	(25,338)
Trade names [Member]
Intangible Assets by Major Class [Line Items]
Indefinite-lived intangibles, gross amount	32,140	32,140
Customer relationships [Member]
Intangible Assets by Major Class [Line Items]
Definite-lived intangibles, gross amount	201,886	206,855
Definite-lived intangibles, accumulated amortization	(31,467)	(21,861)
Other definite-lived intangibles [Member]
Intangible Assets by Major Class [Line Items]
Definite-lived intangibles, gross amount	14,989	15,509
Definite-lived intangibles, accumulated amortization	$ (5,778)	$ (3,477)