Income Taxes - Summary of Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 1,088	$ 1,376
Additions based on tax positions related to current year	74	87
Additions based on tax positions of prior year
Reductions for tax positions of prior years
Reductions due to expiration of statute of limitations	(502)	(375)
Balance at end of year	$ 660	$ 1,088