CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows provided by (used in) operating activities
Net income	$ 113,691	$ 122,565	$ 128,311
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	8,590	2,399	4,623
Amortization of intangible assets	10,057	10,432	11,628
Amortization of mortgage servicing rights	997	2,785	3,540
Amortization of New Markets Tax Credit	0	8,999	6,333
Depreciation and amortization of premises and equipment	9,503	9,488	10,482
Net amortization (accretion) on portfolio loans	4,372	6,971	3,932
Net amortization (accretion) of premium (discount) on investment securities	8,857	14,406	20,799
Net amortization (accretion) of premium (discount) on time deposits	101	(270)	(403)
Net amortization (accretion) of premium (discount) on FHLB advances and other borrowings	1,158	1,027	1,400
Impairment of OREO and other repossessed assets	0	100	611
Impairment of fixed assets held for sale	637	0	427
Impairment of mortgage servicing rights	0	1	(8)
Impairment of leases	0	0	84
Unrealized (gains) losses recognized on equity securities, net	(931)	2,171	2,183
(Gain) loss on sales of equity securities, net	0	(5,475)	(24)
(Gain) loss on sales of debt securities, net	7,033	5,503	(26)
Realized net gains (losses) on the sale of mortgage servicing rights	(7,724)	0	0
(Gain) loss on sales of loans, net	(1,761)	(733)	(1,944)
(Gain) loss on sales of OREO and other repossessed assets	(585)	(46)	(54)
(Gain) loss on sales of premises and equipment	(138)	(450)	(825)
(Gain) loss on life insurance proceeds	(895)	(759)	0
(Increase) decrease in cash surrender value of bank owned life insurance	(4,235)	(3,942)	(3,663)
Provision for deferred income taxes	1,384	(2,920)	(1,272)
Stock-based compensation	7,726	6,595	8,968
Proceeds from the sale of mortgage servicing rights	9,796	0	0
Mortgage loans originated for sale	(104,176)	(35,413)	(70,953)
Proceeds from sales of mortgage loans	104,670	35,018	95,289
(Increase) decrease in other assets	19,752	(17,888)	(56,284)
Increase (decrease) in other liabilities	(9,612)	12,826	2,633
Net cash provided by (used in) operating activities	178,267	173,390	165,787
Cash flows provided by (used in) investing activities
Purchases of equity securities	(30,422)	(6,617)	(14,820)
Purchases of debt securities available for sale	(182,603)	(10,436)	(280,083)
Proceeds from sales of equity securities	25,303	11,644	15,418
Proceeds from sales of debt securities available for sale	101,361	105,044	0
Proceeds from paydowns and maturities of debt securities held to maturity	48,822	48,927	70,116
Proceeds from paydowns and maturities of debt securities available for sale	370,774	326,252	470,134
Purchases of restricted bank stock	(43,954)	(30,957)	(12,969)
Proceeds from the redemption of restricted bank stock	884	43,926	225
Purchases of loans	(14,602)	0	0
Net (increase) decrease in loans	364,455	65,240	(541,713)
Net cash received in (paid for) acquisitions	18,377	0	0
Cash paid for premiums on bank-owned life insurance	(74)	(80)	(106)
Proceeds from life insurance	3,092	2,292	219
Purchases of premises and equipment	(6,430)	(9,533)	(4,989)
Proceeds from disposition of premises and equipment	2,247	4,425	4,528
Proceeds from sales of OREO and other repossessed assets, including cash payments collected	673	860	3,184
Net cash provided by (used in) investing activities	657,903	550,987	(290,856)
Cash flows provided by (used in) financing activities
Net increase (decrease) in deposits	(701,605)	220,146	(696,894)
Net increase (decrease) in federal funds purchased and securities sold under agreements to repurchase	(32,969)	(42,410)	(40,333)
Net increase (decrease) in short-term borrowings	(36,000)	(335,000)	330,000
Proceeds from other borrowings, net of debt issuance costs	0	0	98,094
Repayment of other borrowings	(31,450)	(16,054)	(112,678)
Cash dividends paid	(54,169)	(53,076)	(50,863)
Purchase of treasury stock	0	(4,482)	(9,912)
Cash paid for withholding taxes on stock-based payments	(1,755)	(1,093)	(1,276)
Proceeds from stock options exercised	(3)	0	0
Proceeds from stock warrants exercised	0	9	0
Common stock issuance costs	(141)	0	0
Net cash provided by (used in) financing activities	(858,092)	(231,960)	(483,862)
Net increase (decrease) in cash and cash equivalents	(21,922)	492,417	(608,931)
Cash and cash equivalents, beginning of period	719,581	227,164	836,095
Cash and cash equivalents, ending of period	697,659	719,581	227,164
Cash payments for:
Interest	208,359	135,482	35,297
Income taxes	12,907	25,408	30,676
Non-cash investing and financing activities:
OREO acquired in settlement of loans	26	189	175
Transfer of debt securities available for sale to held to maturity	$ 0	$ 0	$ 985,199