UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 976	$ (12,631)
Other comprehensive income (loss):
Unrealized gains (losses) on available-for-sale securities (net of tax of $31 and $80, respectively)	143	(195)
Unrealized loss on interest rate hedge	(5,017)	0
Reclassification adjustment for losses on interest rate hedge included in net income (loss) (net of taxes of $0 and $0, respectively)	358	0
Foreign currency translation adjustments	8,540	(16,551)
Other comprehensive income (loss)	4,024	(16,746)
Comprehensive income (loss)	$ 5,000	$ (29,377)