COMPREHENSIVE INCOME (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
COMPREHENSIVE INCOME [Abstract]
Net income	$ 46,798	$ 35,289	$ 103,807	$ 98,721
Other comprehensive income, net of tax:
Foreign currency translation adjustment	(8,027)	5,885	(3,490)	2,111
Net unrealized losses on foreign currency cash flow hedges	(2,289)		(2,144)	29
Less: Reclassification adjustment for realized losses (gains) in current earnings	$ (419)		$ (315)	$ 126