Condensed Consolidated Statements Of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,560)	$ (16,415)
Other comprehensive income, net of tax:
Unrealized gain on hedges arising during the period	2,153	909
Reclassification adjustments for loss on hedges included in net loss	1,627	3,490
Income taxes on unrealized gain on hedges	(815)	(1,556)
Unrealized gain on hedges, net of tax	2,965	2,843
Unrealized loss on note receivable arising during the period	(629)	0
Income taxes on unrealized loss on note receivable	132	0
Unrealized loss on note receivable, net of tax	(497)	0
Foreign currency translation gain	4,691	3,108
Other comprehensive income, net of tax	7,159	5,951
Comprehensive income (loss)	$ 4,599	$ (10,464)