Condensed Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (27,823)	$ 19,642
Other comprehensive loss, net of tax:
Unrealized gain (loss) on hedges arising during the period	3,376	(11,711)
Reclassification adjustments for loss on hedges included in net income (loss)	3,440	1,673
Income taxes on unrealized (gain) loss on hedges	(2,317)	3,513
Unrealized gain (loss) on hedges, net of tax	4,499	(6,525)
Foreign currency translation loss arising during the period	(6,575)	(13,869)
Reclassification adjustment for translation loss realized upon liquidation	289	0
Foreign currency translation loss	(6,286)	(13,869)
Other comprehensive loss, net of tax	(1,787)	(20,394)
Comprehensive loss	$ (29,610)	$ (752)