DERIVATIVES (OCI ROLLFORWARD) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
DERIVATIVES [ABSTRACT]
Aggregate unrealized net gain/(loss) at beginning of year	$ (15,753)	$ (24,209)	$ (15,746)	$ (32,393)
Add: Net gain/(loss) from change in fair value of cash flow hedges	2,059	7,448	5,945	19,768
Less: Net (gain)/loss reclassified to earnings from effective hedges	(3,565)	(2,969)	(7,458)	(7,105)
Aggregate unrealized net gain/(loss) at end of period	$ (17,259)	$ (19,730)	$ (17,259)	$ (19,730)