Income Taxes - Reconciliation of the 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]
Balance at beginning of year	$ 49	$ 3,647	$ 3,329
Additions for tax positions of prior years			366
Additions for tax positions of current year	235
Reductions for tax positions of prior years	(19)	(3,598)	(48)
Balance at end of year	$ 265	$ 49	$ 3,647