Goodwill and Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Intangible Assets Other Than Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets with finite lives, Gross Carrying Amount	$ 279,002	$ 279,002
Intangible assets with finite lives, Accumulated Amortization	(35,754)	(33,577)
Intangible assets with finite lives, Net Carrying Amount	243,248	245,425
Customer-Related and Other
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets with finite lives, Gross Carrying Amount	49,225	49,225
Intangible assets with finite lives, Accumulated Amortization	(30,509)	(28,575)
Intangible assets with finite lives, Net Carrying Amount	18,716	20,650
Trademarks
Finite-Lived Intangible Assets, Net [Abstract]
Intangible assets with finite lives, Gross Carrying Amount	8,096	8,096
Intangible assets with finite lives, Accumulated Amortization	(5,245)	(5,002)
Intangible assets with finite lives, Net Carrying Amount	2,851	3,094
Trademarks
Indefinite-Lived Intangible Assets, Net [Abstract]
Intangible assets with indefinite lives, Gross Carrying Amount	221,681	221,681
Intangible assets with indefinite lives, Accumulated Amortization	0	0
Intangible assets with indefinite lives, Net Carrying Amount	$ 221,681	$ 221,681