Income Taxes - Schedule of Components of Income Tax Provision (Benefit) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Federal	$ 2,509	$ 12,035	$ 651
State	68	72	161
Total current tax provision	2,577	12,107	812
Deferred tax provision (benefit)	12,704	2,551	(1,192)
Total tax provision (benefit), Amount	$ 15,281	$ 14,658	$ (380)