Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ (1,034)
Unrealized net gains (losses) on securities available-for-sale, net of tax	160	$ 4
Foreign currency translation adjustments, net of tax	99	(271)
Other comprehensive income (loss)	259	(267)
Ending Balance	(775)
Unrealized net gains (losses) on investments, tax benefit (expense)	97	1
Foreign currency translation adjustments, tax benefit (expense)	61	(165)
Unrealized Gains and (Losses) on Securities Available-for-Sale [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(465)	(107)
Unrealized net gains (losses) on securities available-for-sale, net of tax	160	4
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Other comprehensive income (loss)	160	4
Ending Balance	(305)	(103)
Unrealized net gains (losses) on investments, tax benefit (expense)	(97)	(1)
Foreign Currency Translation Adjustments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(569)	(135)
Foreign currency translation adjustments, net of tax	99	(271)
Amounts reclassified from accumulated other comprehensive income (loss)	0	0
Other comprehensive income (loss)	99	(271)
Ending Balance	(470)	(406)
Foreign currency translation adjustments, tax benefit (expense)	$ (61)	$ 165