Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Feb. 17, 2016 contracts	Feb. 11, 2016 contracts	Dec. 31, 2015 USD ($)	Dec. 03, 2015 contracts	Nov. 10, 2015 contracts	Nov. 14, 2014 contracts
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Fair Value Assumptions, Expected Dividend Rate	0.00%
Accumulated other comprehensive loss	$ (224,285)				$ (242,409)
Unrealized gain / (loss) on derivative instruments (Note 12)	(1,248)	$ (607)
Forward Contracts [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative, Number of Instruments Held \| contracts			5	1		2
Interest rate swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative, Number of Instruments Held \| contracts							3	2
Accumulated other comprehensive loss	(2,668)				$ (1,420)
Unrealized gain / (loss) on derivative instruments (Note 12)	(1,551)
Fair Value, Inputs, Level 2 [Member] \| Forward Contracts [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Currency forward contracts	(14,050)	$ (1,010)
Interest Expense [Member] \| Interest rate swap [Member]
Fair Value, By Balance Sheet Grouping Disclosure Information [Line Items]
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	$ 303