ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (INCOME STATEMENT CLASSIFICATION TABLE) (DETAILS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income			$ (3,209)	$ 129
Net Income (Loss) [Member] | Derivative Valuation [Member]
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income	1,582	305	3,501	279
Net Income (Loss) [Member] | Other Accumulated Other Comprehensive Income Loss [Member]
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income	(145)	(205)	(292)	(408)
Gain Loss on Foreign Currency Forward Contracts [Member] | Revenue [Member] | Derivative Valuation [Member]
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income	2,850	692	6,310	649
Loss on Interest Rate Swaps [Member] | Interest Expenses [Member] | Derivative Valuation [Member]
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income	(257)	(183)	(514)	(183)
Tax Effect [Member] | Provision for Income Taxes [Member] | Derivative Valuation [Member]
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income	(1,011)	(204)	(2,295)	(187)
Tax Effect [Member] | Provision for Income Taxes [Member] | Other Accumulated Other Comprehensive Income Loss [Member]
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income	9	13	19	26
Actuarial Loss on Defined Benefit Plan [Member] | Cost of Services [Member] | Other Accumulated Other Comprehensive Income Loss [Member]
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income	$ (154)	$ (218)	$ (311)	$ (434)