Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Statements Of Comprehensive Income [Abstract]
Net income (loss)	$ 7,136	$ 7,799	$ 30,356	$ (4,899)
Other comprehensive income (loss):
Foreign currency translation adjustments	(1,470)	(249)	(1,718)	(1,569)
Unrealized gain on investments, net of tax	0	0	0	41
Unrealized gain (loss) on derivative, net of tax	(853)	82	(4,399)	1,159
Other	(546)	0	(752)	0
Other comprehensive loss	(2,869)	(167)	(6,869)	(369)
Comprehensive income (loss)	$ 4,267	$ 7,632	$ 23,487	$ (5,268)