Income Taxes - Significant Components of the Provision (Benefit) for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Federal	$ 7,963	$ 4,605	$ 133
State	987	666	59
Total current	8,950	5,271	192
Deferred:
Federal	764	3,168	(3,253)
State	(143)	(1,485)	771
Total deferred	621	1,683	(2,481)
Tax provision (benefit) recorded as an increase (decrease) in liability for unrecorded tax benefits	219	920	(299)
Provision (benefit) for income taxes	$ 9,790	$ 7,874	$ (2,589)