Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Consolidated Statements Of Comprehensive Income [Abstract]
Net income (loss)	$ 13,773	$ (23,641)
Other comprehensive income (loss):
Foreign currency translation adjustments	(833)	1,332
Unrealized loss on derivative, net of tax	(1,285)	833
Other	(15)	0
Other comprehensive income (loss)	(2,133)	2,165
Comprehensive income (loss)	$ 11,640	$ (21,476)