Other Comprehensive Income (Loss) - Summary of Other Comprehensive Income (Loss) and Tax Impact (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]
Net unrealized (loss) gain on available-for-sale securities, net of income taxes	$ 89	$ 231
Net unrealized gain (loss) on interest rate swaps, net of income taxes	93	(532)
Foreign currency translation	(2)	(10)
Total other comprehensive income (loss)	$ 180	$ (311)