Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Operating activities
Net income	$ 12,456,000	$ 6,748,000	$ 6,748,000
Adjustments to reconcile net income to net cash from Operating activities:
Depreciation and amortization of premises and equipment	500,000	522,000
Net accretion of securities, loans, deposits, and other	(391,000)	(873,000)
Unrealized loss on equity securities	20,000	0
Amortization of investment in affordable housing tax credits	259,000	247,000
Amortization of intangible assets	1,707,000	1,441,000
Amortization of right-of-use asset	1,314,000	0
Change in operating lease liabilities	(1,257,000)	0
Provision for loan losses	1,500,000	1,945,000	11,823,000
Stock-based compensation	287,000	161,000
Deferred tax expense (benefit)	(880,000)	1,503,000
Gain on sale of loans	(3,841,000)	(2,711,000)
Increase in cash surrender value of life insurance	(187,000)	(191,000)
Loans originated and purchased for sale, net	(68,236,000)	(30,423,000)
Proceeds from loans sold	136,866,000	104,273,000
Other items	29,129,000	(4,442,000)
Net cash provided by operating activities	109,246,000	78,200,000
Investing activities
Purchases	(176,164,000)	(151,163,000)
Maturities, prepayments and calls	103,620,000	151,707,000
Securities held to maturity:
Maturities, prepayments and calls	500,000	500,000
Sale (purchase) of Federal Home Loan Bank stock and other equity securities, net	12,000	(621,000)
Net increase of investment in qualified affordable housing projects	(309,000)	(2,004,000)
Net increase in loans	(61,207,000)	(45,668,000)
Net cash received in connection with acquisition	0	6,634,000
Purchases of premises and equipment	(478,000)	(135,000)
Net cash used in investing activities	(134,026,000)	(40,750,000)
Financing activities
Net increase (decrease) in demand deposits and savings accounts	230,636,000	(108,420,000)
Net increase (decrease) in time deposits	(44,407,000)	107,130,000
Advances on long-term FHLB advances	0	150,000,000
Cash dividends paid	(2,347,000)	(2,414,000)
Redemption of subordinated debentures	(50,000,000)	0
Issuance of subordinated debentures, net of issuance costs	118,111,000	0
Common stock repurchased, net of repurchased costs	(2,277,000)	(5,254,000)
Exercise of stock options	340,000	712,000
Net cash provided by financing activities	250,056,000	141,754,000
Net increase in cash and cash equivalents	225,276,000	179,204,000
Cash and cash equivalents at beginning of period	194,654,000	181,763,000	181,763,000
Cash and cash equivalents at end of period	419,930,000	360,967,000	$ 194,654,000
Cash paid during the period:
Interest paid	5,298,000	8,643,000
Non-cash investing and financing activities:
Transfer of loans to held for sale, net	52,771,000	15,041,000
Loan to facilitate OREO	0	1,025,000
Additions to servicing assets	705,000	827,000
Net change in unrealized holding (loss) gain on securities available for sale	1,279,000	350,000
Recognition of operating lease right-of-use assets	(26,814,000)	0
Recognition of operating lease liabilities	26,814,000	0
Acquisition:
Assets acquired, net of cash received	0	182,895,000
Liabilities assumed	0	200,209,000
Cash considerations	0	32,885,000
Goodwill	$ 0	$ 10,680,000