DERIVATIVE FINANCIAL INTSTRUMENTS - Summary of Outstanding Swaptions (Details) - Payer Swaption [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Long [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost	$ 36,690	$ 16,860
Net Estimated Fair Value	$ 21,493	$ 17,433
Derivative Instruments Average Months To Expiration	14 months 21 days	11 years
Notional Amount	$ 1,658,500	$ 1,175,000
Derivative Average Fixed Interest Rate	2.27%	1.26%
Derivative Avergage Receive Rate	3 Month	3 Month
Term (Years)	11 years 10 months 24 days	9 years
Less Than Or Equal To One Year [Member] | Short [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost	$ (16,185)	$ (4,660)
Net Estimated Fair Value	$ (4,423)	$ (7,730)
Derivative Instruments Average Months To Expiration	5 months 9 days	5 years 4 months 24 days
Notional Amount	$ 1,331,500	$ 507,700
Derivative Average Fixed Interest Rate	2.29%	1.49%
Derivative Avergage Receive Rate	3 Month	3 Month
Term (Years)	11 years 4 months 24 days	12 years 9 months 18 days
Less Than Or Equal To One Year [Member] | Long [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost	$ 4,000	$ 3,450
Net Estimated Fair Value	$ 1,575	$ 5
Derivative Instruments Average Months To Expiration	3 months 6 days	2 years 6 months
Notional Amount	$ 400,000	$ 500,000
Derivative Average Fixed Interest Rate	1.66%	0.95%
Derivative Avergage Receive Rate	3 Month	3 Month
Term (Years)	5 years	4 years
One Year To Two Years [Member] | Long [Member]
Derivatives, Fair Value [Line Items]
Swaption Cost	$ 32,690	$ 13,410
Net Estimated Fair Value	$ 19,918	$ 17,428
Derivative Instruments Average Months To Expiration	18 months 12 days	17 years 4 months 24 days
Notional Amount	$ 1,258,500	$ 675,000
Derivative Average Fixed Interest Rate	2.46%	1.49%
Derivative Avergage Receive Rate	3 Month	3 Month
Term (Years)	14 years 1 month 6 days	12 years 9 months 18 days