Condensed Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (10,671)	$ (2,635)	$ (38,494)	$ 17,007
Other comprehensive loss, net of tax:
Unrealized gain (loss) on hedges arising during the period	(2,344)	3,346	1,032	(8,365)
Reclassification adjustments for loss on hedges included in net income (loss)	3,054	3,258	6,494	4,931
Income taxes on unrealized (gain) loss on hedges	(236)	(2,311)	(2,553)	1,202
Unrealized gain (loss) on hedges, net of tax	474	4,293	4,973	(2,232)
Foreign currency translation gain (loss) arising during the period			(21,216)	2,020
Reclassification adjustment for translation loss realized upon liquidation			289	0
Foreign currency translation gain (loss)	(14,641)	15,889	(20,927)	2,020
Other comprehensive income (loss), net of tax	(14,167)	20,182	(15,954)	(212)
Comprehensive income (loss)	$ (24,838)	$ 17,547	$ (54,448)	$ 16,795