Income Taxes - Schedule of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Beginning Balance, January 1	$ 3,134	$ 3,374	$ 4,500
Additions based on tax positions taken during a prior period	169	308	61
Reductions based on tax positions taken during a prior period	(5)	(11)	(23)
Additions based on tax positions taken during the current period	389	451	291
Reductions related to settlement of tax matters	(184)	(490)	(894)
Reductions related to lapses of applicable statutes of limitation	(395)	(498)	(561)
Ending Balance, December 31	$ 3,108	$ 3,134	$ 3,374