ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (INCOME STATEMENT CLASSIFICATION TABLE) (DETAILS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income			$ (3,452)	$ (214)
Net Income (Loss) [Member] | Derivative Valuation [Member]
Presentation of Income Statement Reclassifications [Line Items]
Other Comprehensive Income Loss Reclassified to Income	398	591	3,899	870
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	(147)	(222)	(447)	(656)
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	917	1,367	7,227	2,016
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	(264)	(380)	(778)	(564)
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	(255)	(396)	(2,550)	(582)
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	26	39
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	$ (156)	$ (235)	$ (473)	$ (695)