Condensed Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (16,415)	$ (27,823)
Other comprehensive income (loss), net of tax:
Unrealized gain on hedges arising during the period	909	3,376
Reclassification adjustments for loss on hedges included in net loss	3,490	3,440
Income taxes on unrealized gain on hedges	(1,556)	(2,317)
Unrealized gain on hedges, net of tax	2,843	4,499
Foreign currency translation gain (loss) arising during the period	3,108	(6,575)
Reclassification adjustment for translation loss realized upon liquidation	0	289
Foreign currency translation gain (loss)	3,108	(6,286)
Other comprehensive income (loss), net of tax	5,951	(1,787)
Comprehensive loss	$ (10,464)	$ (29,610)