Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Consolidated Statements Of Comprehensive Income (Loss)
Net income (loss)	$ 8,779	$ (175,570)	$ 9,766	$ (161,307)
Unrealized gain on interest rate swap contracts and foreign currency forward contracts, net of deferred income tax (benefit) expense	5,192	5,190	24,583	10,779
Foreign currency translation adjustments, net of deferred income tax expense	(1,144)	17,871	(24,324)	51,142
Other comprehensive income	4,048	23,061	259	61,921
Total comprehensive income (loss)	12,827	(152,509)	10,025	(99,386)
Less: Comprehensive loss attributable to noncontrolling interests	(5)	(9)	(14)	(4)
Comprehensive income (loss) attributable to controlling interests	$ 12,832	$ (152,500)	$ 10,039	$ (99,382)