CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities
Net earnings	$ 39,806	$ 27,402	$ 26,279
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	4,358	4,117	3,886
Amortization	1,154	1,349	1,378
Deferred taxes	(143)	(3,056)	(534)
Premium amortization, net of discount accretion	4,368	3,988	3,820
Net realized loss on securities transactions	0	0	22
Gain on sale of loans	(5,528)	(6,834)	(2,850)
(Reversal) Provision for credit losses	(1,700)	13,200	1,250
Origination of loans held for sale	(118,500)	(161,169)	(76,011)
Proceeds from loans held for sale	125,441	164,829	78,288
Write-down of other real estate and repossessed assets	6	358	343
Net gain on sale of premises, equipment, other real estate owned and other assets	(23)	37	78
Stock based compensation	733	749	663
Gain on BOLI death benefits	(277)	0	0
Net change in accrued interest receivable and other assets	(8,565)	(3,908)	(16,698)
Net change in accrued interest payable and other liabilities	2,414	1,459	12,132
Net cash (used in) provided by operating activities	43,544	42,521	32,046
Securities available for sale:
Purchases	(1,223,595)	(662,046)	(706,238)
Proceeds from Sales	0	0	3,957
Proceeds from maturities and principal repayments	1,079,462	657,653	730,272
Securities held to maturity:
Purchases	(15,057)	0	0
Proceeds from maturities and principal repayments	890	3,024	5,646
Net originations of loans	(43,148)	(159,357)	(46,940)
Purchases of premises and equipment	(2,896)	(5,902)	(5,090)
Proceeds from BOLI death benefit	464	0	0
Proceeds from sale of premises, equipment, other real estate owned and other assets	1,202	860	653
Net cash provided by investing activities	(202,678)	(165,768)	(17,740)
Cash flows from financing activities
Net change in deposits	384,437	329,586	85,324
Net change in securities sold under agreements to repurchase	(1,480)	4,531	(1,128)
Proceeds from FHLB advances	160,000	390,000	260,500
Repayment of FHLB advances	(221,601)	(336,017)	(320,518)
Proceeds from line of credit	10,000	30,000	0
Repayment of line of credit	(17,000)	(18,000)	0
Proceeds from issuance of debentures	0	10,000	0
Repayments of debentures	0	(1,000)	(2,000)
Purchase of treasury stock	0	(16,927)	(10,140)
Exercise of stock options	2,019	638	925
Cash dividends paid	(9,427)	(8,487)	(8,065)
Net cash used in financing activities	306,948	384,324	4,898
Net change in cash and cash equivalents	147,814	261,077	19,204
Cash and cash equivalents at beginning of period	351,791	90,714	71,510
Cash and cash equivalents at end of period	499,605	351,791	90,714
Supplemental disclosures of cash flow information
Interest paid	7,315	13,898	23,700
Income taxes paid	9,650	8,245	5,536
Supplemental schedule of noncash investing and financing activities
Cash dividends accrued	2,424	2,188	2,076
Lease right of use assets obtained in exchange for lease liabilities	1,085	1,737	11,554
Available for sale securities transferred to held to maturity	172,292	0	0
Transfer of loans to other real estate owned and repossessed assets	509	666	340
Stock dividend	$ 35,947	$ 0	$ 0