Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (287)
Other comprehensive (loss) income	(112)	96	121	35
Ending Balance	(166)		(166)
Unrealized Gains and (Losses) on Securities Available-for-Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(287)	(14)
Other comprehensive income (loss) before reclassifications, net of tax			139	35
Amounts reclassified from accumulated other comprehensive income
Other comprehensive (loss) income			139	35
Ending Balance	(148)	21	(148)	21
Unrealized Gains and (Losses) on Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance
Other comprehensive income (loss) before reclassifications, net of tax			(18)
Amounts reclassified from accumulated other comprehensive income
Other comprehensive (loss) income			(18)
Ending Balance	$ (18)		$ (18)