CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Cash flows from operating activities
Net earnings	$ 9,253	$ 10,134	$ 30,647	$ 17,487
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation			3,294	3,045
Amortization			932	1,010
Deferred taxes			(181)	(2,949)
Premium amortization, net of discount accretion			3,291	2,948
Gain on sale of loans	(1,759)	(2,114)	(4,401)	(4,811)
Provision for credit losses	(700)	(300)	(1,700)	13,200
Origination of loans held for sale			(84,944)	(121,628)
Proceeds from loans held for sale			92,984	119,659
Write-down of other real estate and repossessed assets			6	358
Net gain on sale of premises, equipment, other real estate owned and other assets			16	103
Stock based compensation			512	494
Net change in accrued interest receivable and other assets			(5,034)	(2,607)
Net change in accrued interest payable and other liabilities			1,799	1,897
Net cash provided by operating activities			37,221	28,206
Securities available for sale:
Purchases			(125,826)	(333,838)
Proceeds from maturities and principal repayments			63,264	342,452
Securities held to maturity:
Purchases			(7,797)
Proceeds from maturities and principal repayments			938	3,024
Net originations of loans			(105,333)	(248,409)
Purchases of premises and equipment			(1,912)	(5,148)
Proceeds from BOLI death benefit			464	0
Proceeds from sale of premises, equipment, other real estate owned and other assets			319	509
Net cash used in investing activities			(175,883)	(241,410)
Cash flows from financing activities
Net change in deposits			276,681	266,278
Net change in securities sold under agreements to repurchase			(4,436)	9,420
Proceeds from FHLB advances			120,000	290,000
Repayment of FHLB advances			(181,601)	(246,013)
Proceeds from line of credit			8,000	25,000
Repayment of line of credit			(17,000)	(18,000)
Proceeds from issuance of debentures			0	10,000
Repayments of debentures			0	(500)
Purchase of treasury stock			0	(14,110)
Exercise of stock options			1,113	72
Cash dividends			(7,011)	(6,286)
Net cash provided by financing activities			195,746	315,861
Net change in cash and cash equivalents			57,084	102,657
Cash and cash equivalents at beginning of period			351,791	90,714	$ 90,714
Cash and cash equivalents at end of period	408,875	193,371	408,875	193,371	$ 351,791
Supplemental disclosures of cash flow information
Interest paid			5,743	11,456
Income taxes paid			7,850	5,545
Supplemental schedule of noncash investing and financing activities
Cash dividends accrued	$ 2,416	$ 2,201	2,416	2,201
Held to maturity securities transferred to available for sale			0	152,486
Available for sale securities transferred to held to maturity			172,292	0
Transfer of loans to other real estate owned and repossessed assets			502	221
Stock dividend			$ 35,947