CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net earnings	$ 30,009	$ 40,423	$ 39,806
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	4,042	4,211	4,358
Amortization	734	724	1,154
Deferred taxes	346	(1,157)	(143)
Premium amortization, net of discount accretion	2,070	4,919	4,368
Net realized loss (gain) on sales of securities available for sale	229	(172)	0
Gain on sale of loans	(1,201)	(2,435)	(5,528)
Provision for (reversal of provision for) credit losses	0	2,150	(1,700)
Origination of loans held for sale	(39,066)	(73,292)	(118,500)
Proceeds from loans held for sale	42,447	76,700	125,441
Write-down of other real estate and repossessed assets	0	19	6
Net gain on sale of premises, equipment, other real estate owned and other assets	(2,943)	(925)	(23)
Stock based compensation	594	688	733
Gain on BOLI death benefits	0	0	(277)
Net change in accrued interest receivable and other assets	(1,860)	(14,446)	(8,565)
Net change in accrued interest payable and other liabilities	3,806	1,439	2,414
Net cash provided by operating activities	39,207	38,846	43,544
Securities available for sale:
Purchases	(1,671,050)	(641,739)	(1,223,595)
Proceeds from Sales	21,268	26,130	0
Proceeds from maturities and principal repayments	1,641,283	628,160	1,079,462
Securities held to maturity:
Purchases	0	(457,452)	(15,057)
Proceeds from maturities and principal repayments	102,681	234,150	890
Net repayment (originations) of loans	53,072	(470,389)	(43,148)
Purchases of premises and equipment	(6,779)	(5,684)	(2,896)
Proceeds from BOLI death benefit	0	0	464
Proceeds from sale of premises, equipment, other real estate owned and other assets	3,558	1,860	1,202
Net cash provided by investing activities	144,033	(684,964)	(202,678)
Cash flows from financing activities
Net change in deposits	(47,908)	10,664	384,437
Net change in securities sold under agreements to repurchase	17,951	(6,930)	(1,480)
Proceeds from FHLB advances	3,275,000	1,135,000	160,000
Repayment of FHLB advances	(3,425,000)	(892,500)	(221,601)
Proceeds from line of credit	17,500	1,000	10,000
Repayment of line of credit	(13,000)	(6,000)	(17,000)
Proceeds from issuance of subordinated debt	0	34,436	0
Repayments of debentures	(3,500)	(5,093)	0
Purchase of treasury stock	(11,227)	(8,838)	0
Exercise of stock options	698	1,565	2,019
Cash dividends paid	(10,697)	(10,324)	(9,427)
Net cash (used in) financing activities	(200,183)	252,980	306,948
Net change in cash and cash equivalents	(16,943)	(393,138)	147,814
Cash and cash equivalents at beginning of period	106,467	499,605	351,791
Cash and cash equivalents at end of period	89,524	106,467	499,605
Supplemental disclosures of cash flow information
Interest paid	56,588	13,513	7,315
Income taxes paid	7,580	9,940	9,650
Supplemental schedule of noncash investing and financing activities
Cash dividends accrued	2,654	2,627	2,424
Lease right of use assets obtained in exchange for lease liabilities	1,695	337	1,085
Available for sale securities transferred to held to maturity, net of unrealized loss of $13,186 for 2022 and net of unrealized gain of $10,235 for 2021.	0	106,157	172,292
Transfer of loans to other real estate owned and repossessed assets	292	70	509
Contributions from noncontrolling interest	0	574	0
Stock dividend	$ 0	$ 0	$ 35,947