Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net income	$ 75,948	$ 74,627	$ 59,313
Proceeds from sales of loans held for sale	103,347	351,391	317,173
Originations of loans held for sale	(95,007)	(332,289)	(316,125)
Items not requiring (providing) cash
Depreciation	8,498	9,555	10,007
Amortization	1,179	1,583	2,075
Compensation expense for stock option grants	1,437	1,225	1,153
Provision (credit) for credit losses	3,000	(6,700)	15,871
Provision for unfunded commitments	3,187	939	0
Net gain on loan sales	(2,584)	(9,463)	(8,089)
Net realized (gain) loss on available-for-sale securities	130	0	(78)
Gain on sale of premises and equipment	(1,023)	(1)	(37)
Loss (gain) on sale/write-down of other real estate and repossessions	(126)	(71)	840
Accretion of deferred income, premiums, discounts and other	(7,719)	(10,262)	(6,147)
Loss (gain) on derivative interest rate products	(321)	(312)	264
Deferred income taxes	2,485	3,712	(11,480)
Changes in
Interest receivable	(8,402)	2,088	362
Prepaid expenses and other assets	(24,248)	3,257	(17,163)
Accrued expenses and other liabilities	5,637	(2,495)	(612)
Income taxes refundable/payable	1,162	(1,808)	(1,279)
Net cash provided by operating activities	66,580	84,976	46,048
Investing Activities
Net change in loans	(134,344)	448,599	(62,493)
Purchase of loans	(361,817)	(152,797)	(92,099)
Cash received for termination of interest rate derivative	0	0	45,864
Purchase of premises and equipment	(20,110)	(5,739)	(8,224)
Proceeds from sale of premises and equipment	3,980	586	781
Proceeds from sale of other real estate and repossessions	2,351	2,230	4,096
Capitalized costs on other real estate owned	0	0	(126)
Proceeds from sale of available-for-sale securities	18,375	0	19,236
Proceeds from repayments of held-to-maturity securities	23,821	0	0
Proceeds from maturities, calls and repayments of available-for-sale securities	51,348	72,149	76,248
Purchase of available-for-sale securities	(360,725)	(177,466)	(118,296)
Redemption (purchase) of Federal Home Loan Bank stock and other interest-earning assets	(24,159)	3,151	3,667
Net cash provided by (used in) investing activities	(801,280)	190,713	(131,346)
Financing Activities
Net increase (decrease) in certificates of deposit	321,718	(429,723)	(330,306)
Net increase (decrease) in checking and savings accounts	(188,909)	464,921	887,114
Net increase (decrease) in short-term borrowings and other interest-bearing liabilities	127,471	(26,737)	(146,632)
Advances from (to) borrowers for taxes and insurance	443	(1,389)	52
Proceeds from issuance of subordinated notes	0	0	73,513
Redemption of subordinated notes	0	(75,000)	0
Purchase of the company's common stock	(61,847)	(39,123)	(22,104)
Dividends paid	(19,181)	(18,800)	(33,426)
Stock options exercised	6,258	3,700	661
Net cash provided by (used in) financing activities	185,953	(122,151)	428,872
Increase (Decrease) in Cash and Cash Equivalents	(548,747)	153,538	343,574
Cash and Cash Equivalents, Beginning of Year	717,267	563,729	220,155
Cash and Cash Equivalents, End of Year	$ 168,520	$ 717,267	$ 563,729