DERIVATIVES AND HEDGING (Derivative Offsetting) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Offsetting Derivative Assets [Abstract]
Derivative Assets, Gross Amounts Recognized	$ 19,289	$ 5,038
Derivative Assets, Amounts offsett in the Statement of Financial Condition	0	(1,900)
Derivative Assets, Net Amounts in the Statement of Financial Condition	19,289	3,138
Derivative Assets, Netting Adjustment Per Applicable Master Netting Agreements	0	0
Derivative Assets, Fair Value of Financial Collateral in the Statement of Financial Condiation	0	0
Derivative Assets, Net Amount	19,289	3,138
Offsetting Derivative Liabilities [Abstract]
Derivative Liabilities, Gross Amounts Recognized	19,289	5,038
Derivative Liabilities, Amounts offset in the Statement of Financial Condition	(4,890)	(1,900)
Derivative Liabilities, Net Amounts of the Statement of Financial Condition	14,399	3,138
Derivative Liabilities, Net Adjustment Per Applicable Master Netting Agreements	0	0
Derivative Liabilities, Fair Value of Financial Collateral in the Statement of Financial Condition	(14,383)	(1,320)
Derivative Liabilities, Net Amount	16	1,818
Interest rate swaps [Member]
Offsetting Assets and Liabilities [Line Items]
Derivatives, variation margin adjustment	4,900	0
Offsetting Derivative Assets [Abstract]
Derivative Assets, Gross Amounts Recognized	19,289	5,038
Derivative Assets, Amounts offsett in the Statement of Financial Condition	0	(1,900)
Derivative Assets, Net Amounts in the Statement of Financial Condition	19,289	3,138
Derivative Assets, Netting Adjustment Per Applicable Master Netting Agreements	0	0
Derivative Assets, Fair Value of Financial Collateral in the Statement of Financial Condiation	0	0
Derivative Assets, Net Amount	19,289	3,138
Offsetting Derivative Liabilities [Abstract]
Derivative Liabilities, Gross Amounts Recognized	19,289	5,038
Derivative Liabilities, Amounts offset in the Statement of Financial Condition	(4,890)	(1,900)
Derivative Liabilities, Net Amounts of the Statement of Financial Condition	14,399	3,138
Derivative Liabilities, Net Adjustment Per Applicable Master Netting Agreements	0	0
Derivative Liabilities, Fair Value of Financial Collateral in the Statement of Financial Condition	(14,383)	(1,320)
Derivative Liabilities, Net Amount	$ 16	$ 1,818