FINANCIAL INSTRUMENTS - Effect Of Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest rate swap contracts (Effective Portion)
Amount recognized in other comprehensive income (loss) on derivative	$ 9,802	$ 196
Amount reclassified from AOCI to net (loss)/ income on derivative	627	(827)
Interest rate swap
Interest rate swap contracts (Effective Portion)
Amount reclassified from AOCI to net (loss)/ income on derivative	627	(827)
Derivatives designated as hedging instruments | Cash flow hedges | Interest rate swap
Interest rate swap contracts (Ineffective Portion)
Amount of gain / (loss) recognized in income on derivatives		683
Derivatives designated as hedging instruments | Cash flow hedges | Interest rate swap | Interest Expense, net
Interest rate swap contracts (Effective Portion)
Amount recognized in other comprehensive income (loss) on derivative	9,802	196
Amount reclassified from AOCI to net (loss)/ income on derivative	$ 627	$ (827)