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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 16,862	$ 37,388	$ 48,165	$ 59,506
Other comprehensive income (loss), net of taxes:
Foreign currency translation adjustment	6,395	(19,268)	14,609	(26,724)
Net unrealized (loss) gain on interest rate swaps:
Unrealized (loss) gain arising during the period, net of tax benefit (provision) of $2,306, ($4,622), $3,818 and ($4,614), respectively	(3,844)	7,704	(6,364)	7,690
Reclassification adjustment for loss included in interest expense, net of tax provision of $1,058, $1,020, $2,102 and $2,045, respectively	1,764	1,701	3,504	3,409
Net unrealized (loss) gain on interest rate swaps, net of tax	(2,080)	9,405	(2,860)	11,099
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES	4,315	(9,863)	11,749	(15,625)
COMPREHENSIVE INCOME	$ 21,177	$ 27,525	$ 59,914	$ 43,881

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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