Income Taxes - Summary of Changes in 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 the beginning of the year	$ 442	$ 311	$ 786
Gross increases for tax positions taken in the current year	8	233	81
Gross increases for tax positions taken in prior years	12	18	0
Gross decreases in tax positions due to lapse in statute of limitations	0	(120)	(498)
Gross decreases for tax positions taken in prior years	(192)	0	(25)
Gross decreases for tax settlements with taxing authorities	0	0	(33)
Balance at the end of the year	$ 270	$ 442	$ 311