FEDERAL HOME LOAN BANK ADVANCES AND OTHER BORROWINGS - Summary of Advances from the FHLB (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fixed rate:
Outstanding balance	$ 416,000	$ 461,000
Variable rate:
Outstanding balance	$ 225,000	$ 85,000
Weighted average interest rate (percent)	0.09%	0.17%
Unamortized debt issuance costs	$ 5,900	$ 6,200
Advances Maturing November 27, 2020 and May 27, 2021
Fixed rate:
Interest rate (percent)	0.00%
Advance Maturing May 27, 2021
Fixed rate:
Outstanding balance	$ 5,000
Minimum
Fixed rate:
Interest rate (percent)	0.00%	0.00%
Maximum
Fixed rate:
Interest rate (percent)	3.32%	3.32%
Weighted average (percent)
Fixed rate:
Interest rate (percent)	2.50%	2.51%

Federal Home Loan Bank, Advances, General Debt Obligations, Disclosure, Weighted Average Interest Rate, Variable

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Amount of unearned commitment fees on advances made and reported by Federal Home Loan Bank (FHLBank).

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States the interest rate applicable to Federal Home Loan Bank advances outstanding as of the Balance Sheet date.

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Amount of Federal Home Loan Bank (FHLB) advances which have fixed interest.

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Amount of Federal Home Loan Bank (FHLB) advances which have floating interest rates.

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