Consolidated Statements Of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Consolidated Statements Of Comprehensive (Loss) Income [Abstract]
Net income	$ 9,233	$ 32,711	$ 46,832	$ 86,348
Foreign currency translation adjustments	(36,023)	76,491	(8,738)	137,184
Comprehensive (loss) income	$ (26,790)	$ 109,202	$ 38,094	$ 223,532