FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Financial assets:
Certificates of deposit with banks	$ 11,803,000	$ 12,549,000
Investment securities available-for-sale	410,624,000	235,821,000
Equity securities	27,585,000	18,514,000
Mortgage servicing rights	2,900,000	300,000
Bank-owned life insurance	41,262,000	35,374,000
Financial liabilities:
FHLB and other borrowings	0	222,885,000
FHLB and other borrowings
Financial liabilities:
Derivative liability	0	0
Carrying Value
Financial assets:
Cash and cash equivalents	263,893,000	28,002,000
Certificates of deposit with banks	11,803,000	12,549,000
Investment securities available-for-sale	410,624,000	235,821,000
Equity securities	27,585,000	18,514,000
Loans held-for-sale	1,062,000	109,788,000
Loans	1,427,900,000	1,362,766,000
Mortgage servicing rights	2,942,000	348,000
Accrued interest receivable	7,793,000	7,909,000
Bank-owned life insurance	41,262,000	35,374,000
Financial liabilities:
Deposits	1,982,389,000	1,265,042,000
Repurchase agreements	10,266,000	10,172,000
Accrued interest payable	572,000	1,060,000
Subordinated debt	43,407,000	4,124,000
Carrying Value | Interest rate lock commitment
Financial assets:
Derivative asset		1,660,000
Carrying Value | Interest rate swap
Financial assets:
Derivative asset	13,822,000	5,722,000
Financial liabilities:
Derivative liability	13,822,000	5,722,000
Carrying Value | Fair value hedge
Financial assets:
Derivative asset	2,215,000	1,770,000
Financial liabilities:
Derivative liability	2,141,000	1,418,000
Carrying Value | FHLB and other borrowings
Financial liabilities:
FHLB and other borrowings		222,885,000
Carrying Value | Mortgage-backed security hedges
Financial liabilities:
Derivative liability		186,000
Estimated Fair Value
Financial assets:
Cash and cash equivalents	263,893,000	28,002,000
Certificates of deposit with banks	11,986,000	12,586,000
Investment securities available-for-sale	410,624,000	235,821,000
Equity securities	27,585,000	18,514,000
Loans held-for-sale	1,062,000	109,788,000
Loans	1,434,275,000	1,364,706,000
Mortgage servicing rights	2,942,000	348,000
Accrued interest receivable	7,793,000	7,909,000
Bank-owned life insurance	41,262,000	35,374,000
Financial liabilities:
Deposits	1,964,860,000	1,249,135,000
Repurchase agreements	10,266,000	10,172,000
Accrued interest payable	572,000	1,060,000
Subordinated debt	45,536,000	4,124,000
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level I)
Financial assets:
Cash and cash equivalents	263,893,000	28,002,000
Certificates of deposit with banks	0	0
Investment securities available-for-sale	0	0
Equity securities	472,000	0
Loans held-for-sale	0	0
Loans	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Financial liabilities:
Deposits	0	0
Repurchase agreements	0	0
Accrued interest payable	0	0
Subordinated debt	0	0
Estimated Fair Value | Significant Other Observable Inputs (Level II)
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit with banks	11,986,000	12,586,000
Investment securities available-for-sale	366,945,000	198,562,000
Equity securities	0	0
Loans held-for-sale	1,062,000	109,788,000
Loans	0	0
Mortgage servicing rights	0	0
Accrued interest receivable	2,770,000	1,592,000
Bank-owned life insurance	41,262,000	35,374,000
Financial liabilities:
Deposits	1,964,860,000	1,249,135,000
Repurchase agreements	10,266,000	10,172,000
Accrued interest payable	572,000	1,060,000
Subordinated debt	45,536,000	4,124,000
Estimated Fair Value | Significant Unobservable Inputs (Level III)
Financial assets:
Cash and cash equivalents	0	0
Certificates of deposit with banks	0	0
Investment securities available-for-sale	43,679,000	37,259,000
Equity securities	27,113,000	18,514,000
Loans held-for-sale	0	0
Loans	1,434,275,000	1,364,706,000
Mortgage servicing rights	2,942,000	348,000
Accrued interest receivable	5,023,000	6,317,000
Bank-owned life insurance	0	0
Financial liabilities:
Deposits	0	0
Repurchase agreements	0	0
Accrued interest payable	0	0
Subordinated debt	0	0
Estimated Fair Value | Interest rate lock commitment
Financial assets:
Derivative asset		1,660,000
Estimated Fair Value | Interest rate lock commitment | Quoted Prices in Active Markets for Identical Assets (Level I)
Financial assets:
Derivative asset		0
Estimated Fair Value | Interest rate lock commitment | Significant Other Observable Inputs (Level II)
Financial assets:
Derivative asset		0
Estimated Fair Value | Interest rate lock commitment | Significant Unobservable Inputs (Level III)
Financial assets:
Derivative asset		1,660,000
Estimated Fair Value | Interest rate swap
Financial assets:
Derivative asset	13,822,000	5,722,000
Financial liabilities:
Derivative liability	13,822,000	5,722,000
Estimated Fair Value | Interest rate swap | Quoted Prices in Active Markets for Identical Assets (Level I)
Financial assets:
Derivative asset	0	0
Financial liabilities:
Derivative liability	0	0
Estimated Fair Value | Interest rate swap | Significant Other Observable Inputs (Level II)
Financial assets:
Derivative asset	13,822,000	5,722,000
Financial liabilities:
Derivative liability	13,822,000	5,722,000
Estimated Fair Value | Interest rate swap | Significant Unobservable Inputs (Level III)
Financial assets:
Derivative asset	0	0
Financial liabilities:
Derivative liability	0	0
Estimated Fair Value | Fair value hedge
Financial assets:
Derivative asset	2,215,000	1,770,000
Financial liabilities:
Derivative liability	2,141,000	1,418,000
Estimated Fair Value | Fair value hedge | Quoted Prices in Active Markets for Identical Assets (Level I)
Financial assets:
Derivative asset	0	0
Financial liabilities:
Derivative liability	0	0
Estimated Fair Value | Fair value hedge | Significant Other Observable Inputs (Level II)
Financial assets:
Derivative asset	2,215,000	1,770,000
Financial liabilities:
Derivative liability	2,141,000	1,418,000
Estimated Fair Value | Fair value hedge | Significant Unobservable Inputs (Level III)
Financial assets:
Derivative asset	0	0
Financial liabilities:
Derivative liability	$ 0
Estimated Fair Value | FHLB and other borrowings
Financial liabilities:
FHLB and other borrowings		222,891,000
Estimated Fair Value | FHLB and other borrowings | Quoted Prices in Active Markets for Identical Assets (Level I)
Financial liabilities:
FHLB and other borrowings		0
Estimated Fair Value | FHLB and other borrowings | Significant Other Observable Inputs (Level II)
Financial liabilities:
FHLB and other borrowings		222,891,000
Estimated Fair Value | FHLB and other borrowings | Significant Unobservable Inputs (Level III)
Financial liabilities:
FHLB and other borrowings		0
Estimated Fair Value | Mortgage-backed security hedges
Financial liabilities:
Derivative liability		186,000
Estimated Fair Value | Mortgage-backed security hedges | Quoted Prices in Active Markets for Identical Assets (Level I)
Financial liabilities:
Derivative liability		0
Estimated Fair Value | Mortgage-backed security hedges | Significant Other Observable Inputs (Level II)
Financial liabilities:
Derivative liability		186,000
Estimated Fair Value | Mortgage-backed security hedges | Significant Unobservable Inputs (Level III)
Financial liabilities:
Derivative liability		$ 0