Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Income (Loss) Attributable to Parent [Abstract]
NET INCOME	$ 46,580	$ 46,310	$ 80,871	$ 82,124
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustment	(6,068)	9,999	(3,913)	(20,595)
Net unrealized gain (loss) on interest rate risk management activities, net of tax	(3,480)	3,784	(12,507)	(762)
Unrealized gain (loss) arising during the period, net of tax benefit (provision) of $3,373, ($1,082), $10,058 and $2,825 respectively	(5,621)	1,804	(16,763)	(4,709)
Reclassification adjustment for gain (loss) included in interest expense, net of tax provision of $1,285, $1,188, $2,553 and $2,368 respectively	2,141	1,980	4,256	3,947
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES	(9,548)	13,783	(16,420)	(21,357)
COMPREHENSIVE INCOME	$ 37,032	$ 60,093	$ 64,451	$ 60,767