OFFSETTING ASSETS AND LIABILITIES - Offsetting of Assets (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Offsetting Assets [Line Items]
Derivative, Fair Value, Net	$ 1,336,000	$ 0
Gross Amount Of Assets Offset In The Balance Sheet	0
Net Amount Of Assets Presented In The Balance Sheet	1,336,000
Gross Amounts Of Financial Instruments Received Not Offset In Balance Sheet	0
Gross Amounts Of Cash Collateral Received Not Offset In Balance Sheet	0
Net Amount Of Assets	1,336,000
Payer Swaption [Member]
Offsetting Assets [Line Items]
Derivative, Fair Value, Net	1,336,000
Gross Amount Of Assets Offset In The Balance Sheet	0
Net Amount Of Assets Presented In The Balance Sheet	1,336,000
Gross Amounts Of Financial Instruments Received Not Offset In Balance Sheet	0
Gross Amounts Of Cash Collateral Received Not Offset In Balance Sheet	0
Net Amount Of Assets	$ 1,336,000