ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (INCOME STATEMENT CLASSIFICATION TABLE) (DETAILS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Presentation of Income Statement Reclassifications [Line Items]
Sales Revenue Services Net	$ 312,410	$ 325,521
Interest Expense.	1,964	1,698
Provision for income taxes	4,528	4,405
Net Income (Loss)	11,905	20,035
Accumulated Other Comprehensive Income (Loss)
Presentation of Income Statement Reclassifications [Line Items]
Net Income (Loss) - Other	(3,755)	1,385
Derivative Valuation, Net of Tax
Presentation of Income Statement Reclassifications [Line Items]
Net Income (Loss) - Other	(3,553)	1,139
Reclassification from accumulated other comprehensive income
Presentation of Income Statement Reclassifications [Line Items]
Net Income (Loss) - Other	(202)	(246)
Reclassification from accumulated other comprehensive income | Derivative Valuation, Net of Tax
Presentation of Income Statement Reclassifications [Line Items]
Net Income (Loss)	(3,553)	(1,139)
Reclassification from accumulated other comprehensive income | Tax effect
Presentation of Income Statement Reclassifications [Line Items]
Provision for income taxes	2,573	826
Provision for income taxes - Other	22	28
Reclassification from accumulated other comprehensive income | Cost of Services
Presentation of Income Statement Reclassifications [Line Items]
Cost of services	(224)	(274)
Foreign Exchange Forward | Reclassification from accumulated other comprehensive income | Foreign Currency Translation Adjustment
Presentation of Income Statement Reclassifications [Line Items]
Sales Revenue Services Net	(5,897)	(1,708)
Interest Rate | Reclassification from accumulated other comprehensive income | Loss on interest rate swaps [Member]
Presentation of Income Statement Reclassifications [Line Items]
Interest Expense.	$ (229)	$ (257)