Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 3,728	$ 2,487	$ 16,884	$ 8,418
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities, net of income tax expense of $9, $0, $14 and $0	10	4	23	(6)
Foreign currency translation, net of income tax expense of $5, $5, $9 and $6	(451)	(253)	(803)	(241)
Current period other comprehensive income (loss)	(441)	(249)	(780)	(247)
Comprehensive income	$ 3,287	$ 2,238	$ 16,104	$ 8,171