DERIVATIVES AND HEDGING DERIVATIVES AND HEDGING (Derivative Offsetting) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Offsetting Assets and Liabilities [Line Items]
Derivatives, variation margin adjustment	$ 4,300	$ 0
Derivative Asset, Fair Value, Gross Asset	15,242	5,038
Derivative Asset, Fair Value, Gross Liability	(40)	(1,900)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	15,202	3,138
Derivative, Collateral, Obligation to Return Securities	0	0
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	15,202	3,138
Derivative Liability, Fair Value, Gross Liability	15,242	5,038
Derivative Liability, Fair Value, Gross Asset	(4,276)	(1,900)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	10,966	3,138
Derivative, Collateral, Right to Reclaim Securities	0	0
Derivative, Collateral, Right to Reclaim Cash	(15,209)	(1,320)
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ (4,243)	1,818
Document Period End Date	Dec. 31, 2019
Interest Rate Swap [Member]
Offsetting Assets and Liabilities [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 15,242	5,038
Derivative Asset, Fair Value, Gross Liability	(40)	(1,900)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	15,202	3,138
Derivative, Collateral, Obligation to Return Securities	0	0
Derivative, Collateral, Obligation to Return Cash	0	0
Derivative Asset, Fair Value, Amount Offset Against Collateral	15,202	3,138
Derivative Liability, Fair Value, Gross Liability	15,242	5,038
Derivative Liability, Fair Value, Gross Asset	(4,276)	(1,900)
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	10,966	3,138
Derivative, Collateral, Right to Reclaim Securities	0	0
Derivative, Collateral, Right to Reclaim Cash	(15,209)	(1,320)
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ (4,243)	$ 1,818