Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill And Intangible Assets Disclosure [Abstract]
Carrying amount of goodwill	$ 5,142	$ 23,842
Deferred tax on goodwill	2,879	(3,959)
Pretax impairment	18,700
Goodwill accumulated impairment	18,700	0
Intangible assets amortization expense	$ 190	$ 748	$ 803