Components of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Intangible Assets by Major Class [Line Items]
Definite-lived intangibles, gross amount	$ 210,003	$ 211,474
Intangibles, gross amount	242,143	243,614
Definite-lived intangibles, accumulated amortization	(61,361)	(48,527)
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	195,076	196,856
Definite-lived intangibles, accumulated amortization	(53,298)	(42,099)
Other definite-lived intangibles [Member]
Intangible Assets by Major Class [Line Items]
Definite-lived intangibles, gross amount	14,927	14,618
Definite-lived intangibles, accumulated amortization	$ (8,063)	$ (6,428)