FAIR VALUE MEASUREMENTS, Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Carrying Amount [Member] | Level 1 [Member]
Financial assets [Abstract]
Cash and cash equivalents	$ 245,472	$ 345,929
Carrying Amount [Member] | Level 2 [Member]
Financial assets [Abstract]
Certificates of deposit	11,333	13,272
Loans receivable [Abstract]
Loans held-for-sale	0	1,063
Interest receivable	5,419	4,571
Financial liabilities [Abstract]
Interest payable	67	42
Carrying Amount [Member] | Level 3 [Member]
Financial assets [Abstract]
Stock in Federal Home Loan Bank and other equity securities	9,440	7,097
Loans receivable [Abstract]
Net loans	931,934	852,717
Financial liabilities [Abstract]
Deposits	1,751,195	1,728,302
Fair Value [Member] | Level 1 [Member]
Financial assets [Abstract]
Cash and cash equivalents	245,472	345,929
Fair Value [Member] | Level 2 [Member]
Financial assets [Abstract]
Certificates of deposit	11,093	13,443
Loans receivable [Abstract]
Loans held-for-sale	0	1,089
Interest receivable	5,419	4,571
Financial liabilities [Abstract]
Interest payable	67	42
Fair Value [Member] | Level 3 [Member]
Financial assets [Abstract]
Stock in Federal Home Loan Bank and other equity securities	9,440	7,097
Loans receivable [Abstract]
Net loans	909,173	830,967
Financial liabilities [Abstract]
Deposits	$ 1,477,587	$ 1,678,658