DERIVATIVES (OCI ROLLFORWARD) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
DERIVATIVES [ABSTRACT]
Aggregate unrealized net gain/(loss) at beginning of year	$ (15,746)	$ (32,393)
Add: Net gain/(loss) from change in fair value of cash flow hedges	3,886	12,320
Less: Net (gain)/loss reclassified to earnings from effective hedges	(3,893)	(4,136)
Aggregate unrealized net gain/(loss) at end of period	$ (15,753)	$ (24,209)