Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Cash flows from operating activities:
Net income	$ 20,628	$ 19,372	$ 59,345	$ 59,371
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization			4,034	3,843
Deferred taxes			243	306
Stock-based compensation			1,152	1,008
Provision for credit losses	1,871	2,414	4,996	3,366	$ 4,905
Write-downs of other real estate owned and other repossessed assets			230	275
Gains on sale of mortgage loans held for sale	(105)	(235)	(341)	(1,351)
Securities (gains)/losses			(4)	1
Fair value adjustments in equity securities	(355)	159	(734)	284
Gains on sale of assets, net			(378)	(211)
Proceeds from sale of mortgage loans held for sale			13,271	59,416
Funding of mortgage loans held for sale			(12,821)	(56,476)
Amortization of securities premiums and discounts, net			2,094	4,521
Change in cash surrender value of bank owned life insurance			(1,850)	(1,357)
Changes in lease liabilities			(1,201)	(1,325)
Mortgage servicing rights:
Fair value adjustments			320	(1,247)
New servicing assets created			(141)	(555)
Changes in:
Accrued interest receivable			(1,875)	(1,098)
Other assets			(5,561)	911
Accrued interest payable			5,973	1,485
Other liabilities			(986)	1,247
Net cash provided by operating activities			65,766	72,414
Securities available-for-sale (AFS):
Purchase of AFS securities			(9,398)	(178,055)
Proceeds from sales of AFS securities			20,670	0
Proceeds from prepayments, calls, and maturities of AFS securities			93,104	148,494
Change in loans, net			(277,466)	(221,985)
Purchase of premises and equipment			(5,027)	(4,309)
Proceeds from sale and retirement of premises and equipment			349	512
Purchase of Federal Home Loan Bank stock			(994)	0
Proceeds from sale of stock by Federal Home Loan Bank			0	1,463
Proceeds from sale of other real estate owned and repossessed assets			819	955
Additional investment in other real estate owned and repossessed assets			(47)	(73)
Liquidation of cash surrender value of bank owned life insurance			241	0
Proceeds from settlement of bank owned life insurance			336	1
Net cash used in investing activities			(177,413)	(252,997)
Cash flows from financing activities:
Change in deposits, net			201,749	190,776
Change in repurchase agreements and federal funds purchased, net			17,146	(40,965)
Proceeds from Federal Home Loan Bank advances			225,000	20,000
Payments on advances from Federal Home Loan Bank			(225,015)	(20,015)
Payment of finance lease liabilities			0	(18)
Proceeds from long-term debt/other borrowings			6,563	0
Repayment of long-term debt/other borrowings			(108)	0
Issuance of common stock			837	755
Dividends paid			(23,953)	(22,077)
Net cash provided by financing activities			202,219	128,456
Net increase (decrease) in cash and cash equivalents			90,572	(52,127)
Cash and cash equivalents at beginning of period			128,686	311,756	311,756
Cash and cash equivalents at end of period	$ 219,258	$ 259,629	219,258	259,629	$ 128,686
Supplemental disclosures:
Income taxes paid			17,628	12,260
Interest paid			59,213	14,441
Non-cash activities:
Loans to facilitate the sale of other real estate owned and repossessed assets			1,022	985
Common stock dividends accrued, paid in subsequent quarter			291	286
Real estate acquired in settlement of loans			500	478
Right-of-use assets obtained in exchange for new operating lease liabilities			$ 364	$ 405