SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - RECLASSIFICATION OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Beginning balance	$ (612)
(Decrease) / Increase	(5,480)
Reclassification Adjustment	(3,288)
Ending balance	(9,380)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Beginning balance	(612)
Ending balance	(9,380)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Translation Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Beginning balance	(2,933)
(Decrease) / Increase	(7,574)
Reclassification Adjustment	(99)
Ending balance	(10,606)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Beginning balance	1,219
(Decrease) / Increase	(68)
Reclassification Adjustment	0
Ending balance	1,151
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Beginning balance	1,102
(Decrease) / Increase	2,162
Reclassification Adjustment	(3,189)
Ending balance	$ 75