FAIR VALUE MEASUREMENTS, Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Carrying Amount [Member] | Level 1 [Member]
Financial assets [Abstract]
Cash and cash equivalents	$ 264,403	$ 345,929
Carrying Amount [Member] | Level 2 [Member]
Financial assets [Abstract]
Certificates of deposit	11,091	13,272
Loans receivable [Abstract]
Loans held-for-sale	0	1,063
Interest receivable	5,543	4,571
Financial liabilities [Abstract]
Interest payable	89	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	971,249	852,717
Financial liabilities [Abstract]
Deposits	1,799,605	1,728,302
Fair Value [Member] | Level 1 [Member]
Financial assets [Abstract]
Cash and cash equivalents	264,403	345,929
Fair Value [Member] | Level 2 [Member]
Financial assets [Abstract]
Certificates of deposit	10,699	13,443
Loans receivable [Abstract]
Loans held-for-sale	0	1,089
Interest receivable	5,543	4,571
Financial liabilities [Abstract]
Interest payable	89	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	922,116	830,967
Financial liabilities [Abstract]
Deposits	$ 1,423,719	$ 1,678,658