Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			$ (242)
Unrealized net gains (losses) on securities available-for-sale, net of tax	$ (290)	$ (95)	(389)	$ 90
Foreign currency translation adjustments, net of tax	49	(93)	(271)	(80)
Other comprehensive (loss) income	(241)	(188)	(660)	10
Ending Balance	(902)		(902)
Unrealized net gains (losses) on investments, tax benefit (expense)	(35)	60	26	(55)
Foreign currency translation adjustments, tax benefit (expense)	(28)	56	167	49
Unrealized Gains and (Losses) on Securities Available-for-Sale [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			(107)	(231)
Unrealized net gains (losses) on securities available-for-sale, net of tax			(389)	90
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Other comprehensive (loss) income			(389)	90
Ending Balance	(496)	(141)	(496)	(141)
Unrealized net gains (losses) on investments, tax benefit (expense)			26	(55)
Foreign Currency Translation Adjustments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			(135)	81
Foreign currency translation adjustments, net of tax			(271)	(80)
Amounts reclassified from accumulated other comprehensive income (loss)			0	0
Other comprehensive (loss) income			(271)	(80)
Ending Balance	$ (406)	$ 1	(406)	1
Foreign currency translation adjustments, tax benefit (expense)			$ 167	$ 49