Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Cash flows from operating activities:
Net income	$ 22,142	$ 20,628	$ 60,320	$ 59,345
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			3,760	4,034
Deferred taxes			250	243
Stock-based compensation			1,021	1,152
Provision for credit losses	2,736	1,871	8,364	4,996	$ 6,811
Write-downs of other real estate owned and other repossessed assets			49	230
Gains on sale of mortgage loans held for sale	(80)	(105)	(244)	(341)
Securities gains	(1)		(2)	(4)
Fair value adjustments in equity securities	(212)	(355)	(108)	(734)
Gains on sale of assets, net			(100)	(378)
Proceeds from sale of mortgage loans held for sale			9,344	13,271
Funding of mortgage loans held for sale			(9,063)	(12,821)
Amortization of securities premiums and discounts, net			1,968	2,094
Change in cash surrender value of bank owned life insurance			(3,401)	(1,850)
Changes in lease liabilities			(863)	(1,201)
Mortgage servicing rights:
Fair value adjustments			674	320
New servicing assets created			(100)	(141)
Changes in:
Accrued interest receivable			(195)	(1,875)
Other assets			(2,844)	(5,561)
Accrued interest payable			8,915	5,973
Other liabilities			5,023	(986)
Net cash provided by operating activities			82,768	65,766
Securities available-for-sale (AFS):
Purchase of AFS securities			(51,192)	(9,398)
Proceeds from sales of AFS securities			13,712	20,670
Proceeds from prepayments, calls, and maturities of AFS securities			131,469	93,104
Change in loans, net			(304,365)	(277,466)
Purchase of premises and equipment			(5,044)	(5,027)
Proceeds from sale and retirement of premises and equipment			70	349
Purchase of Federal Home Loan Bank stock			(461)	(994)
Proceeds from sale of other real estate owned and repossessed assets			577	819
Additional investment in other real estate owned and repossessed assets			(13)	(47)
Liquidation of cash surrender value of bank owned life insurance			2,356	241
Proceeds from settlement of bank owned life insurance			1,591	336
Net cash used in investing activities			(211,300)	(177,413)
Cash flows from financing activities:
Change in deposits, net			113,640	201,749
Change in repurchase agreements and federal funds purchased, net			8,079	17,146
Proceeds from Federal Home Loan Bank advances			100,000	225,000
Payments on advances from Federal Home Loan Bank			(100,015)	(225,015)
Proceeds from long-term debt/other borrowings			0	6,563
Repayment of long-term debt/other borrowings			(167)	(108)
Issuance of common stock			1,495	837
Dividends paid			(24,960)	(23,953)
Net cash provided by financing activities			98,072	202,219
Net increase in cash and cash equivalents			(30,460)	90,572
Cash and cash equivalents at beginning of period			271,400	128,686	128,686
Cash and cash equivalents at end of period	$ 240,940	$ 219,258	240,940	219,258	$ 271,400
Supplemental disclosures:
Income taxes paid			17,206	17,628
Interest paid			86,081	59,213
Non-cash activities:
Loans to facilitate the sale of other real estate owned and repossessed assets			238	1,022
Common stock dividends accrued, paid in subsequent quarter			276	291
Real estate acquired in settlement of loans			488	500
Right-of-use assets obtained in exchange for new operating lease liabilities			$ 0	$ 364