UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 36,244	$ 30,747	$ 37,220	$ 18,116
Other comprehensive income (loss):
Unrealized (losses) gains on available-for-sale securities (net of tax of $27, $8, $58 and $88, respectively)	(236)	(11)	(93)	(206)
Reclassification adjustment for losses on available-for-sale securities included in net income	332	0	332	0
Unrealized loss on interest rate hedge	(9,014)	0	(14,031)	0
Reclassification adjustment for losses on interest rate hedge included in net income	397	0	755	0
Foreign currency translation adjustments	13,597	(4,931)	22,137	(21,482)
Other comprehensive income (loss)	5,076	(4,942)	9,100	(21,688)
Comprehensive income (loss)	$ 41,320	$ 25,805	$ 46,320	$ (3,572)