OFFSETTING ASSETS AND LIABILITIES - Offsetting of Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Offsetting Assets [Line Items]
Gross Amount Of Recognized Assets	$ 50,786	$ 20,999
Gross Amount Of Assets Offset In The Balance Sheet	0	0
Net Amount Of Assets Presented In The Balance Sheet	50,786	20,999
Gross Amounts Of Financial Instruments Received Not Offset In Balance Sheet	0	0
Gross Amounts Of Cash Collateral Received Not Offset In Balance Sheet	(6,350)	(6,083)
Net Amount Of Assets	44,436	14,916
Payer Swaption [Member]
Offsetting Assets [Line Items]
Gross Amount Of Recognized Assets	21,493	17,433
Gross Amount Of Assets Offset In The Balance Sheet	0	0
Net Amount Of Assets Presented In The Balance Sheet	21,493	17,433
Gross Amounts Of Financial Instruments Received Not Offset In Balance Sheet	0	0
Gross Amounts Of Cash Collateral Received Not Offset In Balance Sheet	(6,350)	(3,563)
Net Amount Of Assets	15,143	13,870
TBA Contracts [Member]
Offsetting Assets [Line Items]
Gross Amount Of Recognized Assets		3,559
Gross Amount Of Assets Offset In The Balance Sheet		0
Net Amount Of Assets Presented In The Balance Sheet		3,559
Gross Amounts Of Financial Instruments Received Not Offset In Balance Sheet		0
Gross Amounts Of Cash Collateral Received Not Offset In Balance Sheet		(2,520)
Net Amount Of Assets		1,039
Swap [Member]
Offsetting Assets [Line Items]
Gross Amount Of Recognized Assets	29,293	7
Gross Amount Of Assets Offset In The Balance Sheet	0	0
Net Amount Of Assets Presented In The Balance Sheet	29,293	7
Gross Amounts Of Financial Instruments Received Not Offset In Balance Sheet	0	0
Gross Amounts Of Cash Collateral Received Not Offset In Balance Sheet	0	0
Net Amount Of Assets	$ 29,293	$ 7