Goodwill and Other Intangible Assets - Components of Goodwill and Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 349,716	$ 345,453	$ 365,649	$ 364,328
Other intangible assets (net of accumulated amortization)	17,205	18,424
Goodwill and other intangible assets, Total	$ 366,921	$ 363,877