Consolidated Condensed Statements Of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Operating activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 102,234,000	$ 115,267,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	1,095,000	1,576,000
Amortization of Deferred Loan Origination Fees, Net	(6,621,000)	(9,869,000)
Depreciation	10,635,000	10,341,000
Amortization of investment securities, net	3,156,000	2,596,000
Depreciation, Amortization and Accretion, Net	451,000	(402,000)
Gain on equity securities, net	(618,000)	(3,120,000)
Loan originations to be sold in secondary market	(53,432,000)	(157,868,000)
Proceeds from sale of loans in secondary market	53,711,000	169,212,000
Gain on sale of loans in secondary market	0	(495,000)
Share-based compensation expense	5,356,000	4,796,000
Gains (Losses) on Sales of Other Real Estate	3,000	(5,611,000)
Real Estate Owned, Valuation Allowance, Valuation Increase	(15,000)	(12,039,000)
Bank owned life insurance income	(3,965,000)	(4,734,000)
Investment in qualified affordable housing tax credits amortization	6,292,000	5,940,000
Changes in assets and liabilities:
Increase in other assets	(7,000,000)	(2,302,000)
Decrease in other liabilities	(12,092,000)	(8,963,000)
Net cash provided by operating activities	96,855,000	89,613,000
Investing activities:
Proceeds from Sale of Federal Home Loan Bank Stock	4,605,000	2,216,000
Proceeds from Sale, Maturity and Collection of Investments [Abstract]
Available-for-sale securities	108,281,000	148,192,000
Payments to Acquire Investments [Abstract]
Payments to Acquire Debt Securities, Available-for-sale	(3,981,000)	(316,878,000)
Equity securities	(2,195,000)	(9,165,000)
Payments to Acquire Federal Home Loan Bank Stock	(13,636,000)	0
Net loan originations, portfolio loans	(203,298,000)	(234,239,000)
Proceeds from Sale of Other Assets, Investing Activities	0	4,345,000
Payments for Affordable Housing Programs	(6,579,000)	(10,004,000)
Proceeds from the sale of OREO	965,000	17,684,000
Bank owned life insurance death benefits	1,658,000	8,380,000
Payment to Acquire Life Insurance Policy, Investing Activities	(2,500,000)	(7,500,000)
Purchases of premises and equipment	(5,858,000)	(6,576,000)
Net cash used in investing activities	(120,529,000)	(403,153,000)
Financing activities:
Net (decrease) increase in deposits	(185,164,000)	188,536,000
Increase (Decrease) in Other Deposits	195,173,000	216,869,000
Net increase (decrease) in short-term borrowings	125,444,000	(49,293,000)
Payment, Tax Withholding, Share-based Payment Arrangement	(2,844,000)	(2,761,000)
Payments for Repurchase of Common Stock	(23,017,000)	0
Cash dividends paid	(52,028,000)	(51,558,000)
Net cash provided by financing activities	57,564,000	301,793,000
Increase in cash and cash equivalents	33,890,000	(11,747,000)
Cash and cash equivalents at beginning of year	189,728,000	219,180,000
Cash and cash equivalents at end of period	223,618,000	207,433,000
Supplemental disclosures of cash flow information:
Cash paid for interest	68,634,000	18,805,000
Income Taxes Paid	12,200,000	16,070,000
Non cash activities:
Real Estate Owned, Transfer to Real Estate Owned	1,051,000	13,418,000
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	499,000	4,270,000
Affordable Housing Program Obligation, Period Increase (Decrease)	10,000,000	10,000,000
Equity
Non cash activities:
Transfer to Investments	2,745,000	15,000,000
Other Investments
Payments to Acquire Investments [Abstract]
Payments to Acquire Other Investments	(2,009,000)	(392,000)
Consumer Portfolio Segment [Member]
Changes in assets and liabilities:
Increase in prepaid dealer premiums	(1,339,000)	(10,827,000)
Mortgage Loans on Real Estate [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of loans in secondary market	$ (996,000)	$ (3,885,000)