Income Taxes - Components of Income Tax Expense (Benefit) Attributable to Current Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Income before income tax expense (benefit)	$ 45,339	$ 46,063	$ 57,525
Federal tax	575	(144)	(39)
State tax	958	1,179	1,798
Foreign tax	0	4	24
Current income tax benefit	1,533	1,039	1,783
Federal tax	16,790	18,378	(28,252)
State tax	(355)	296	45
Foreign tax	(159)	(634)	163
Deferred income tax benefit	16,276	18,040	(28,044)
Total income tax expense (benefit)	$ 17,809	$ 19,079	$ (26,261)