Components of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Intangible Assets by Major Class [Line Items]
Definite-lived intangibles, gross amount	$ 154,842	$ 82,065
Intangibles, gross amount	186,982	114,205
Definite-lived intangibles, accumulated amortization	(15,065)	(17,763)
Intangibles, accumulated amortization	(15,065)	(17,763)
Trade names
Intangible Assets by Major Class [Line Items]
Indefinite-lived intangibles, gross amount	32,140	32,140
Customer relationships
Intangible Assets by Major Class [Line Items]
Definite-lived intangibles, gross amount	139,506	68,939
Definite-lived intangibles, accumulated amortization	(13,663)	(8,315)
Other definite-lived intangibles
Intangible Assets by Major Class [Line Items]
Definite-lived intangibles, gross amount	15,336	13,126
Definite-lived intangibles, accumulated amortization	$ (1,402)	$ (9,448)