Consolidated Condensed Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities:
Net Income (Loss) Attributable to Parent	$ 73,199	$ 81,963
Adjustments to reconcile net income to net cash provided by operating activities:
Recovery of credit losses	(1,614)	(8,895)
Amortization of Deferred Loan Origination Fees, Net	(7,132)	(13,675)
Depreciation	6,943	6,507
Amortization of investment securities, net	1,704	797
Depreciation, Amortization and Accretion, Net	(241)	(985)
Gain on equity securities, net	(3,062)	(2,277)
Loan originations to be sold in secondary market	(128,306)	(336,984)
Proceeds from sale of loans in secondary market	135,241	367,748
Share-based compensation expense	3,355	3,323
Bank owned life insurance income	(3,549)	(2,314)
Investment in qualified affordable housing tax credits amortization	3,960	3,712
Changes in assets and liabilities:
Increase in other assets	(2,182)	(15,580)
(Decrease) increase in other liabilities	(13,802)	10,250
Net cash provided by operating activities	56,492	80,171
Investing activities:
Payments for (Proceeds from) Federal Home Loan Bank Stock	0	6,549
Proceeds from Sale of Debt Securities, Available-for-sale	0	934
Proceeds from Sale, Maturity and Collection of Investments [Abstract]
Available-for-sale securities	102,660	119,177
Payments to Acquire Investments [Abstract]
Payments to Acquire Debt Securities, Available-for-sale	(316,878)	(437,800)
Equity securities	(2,630)	0
Net loan originations, portfolio loans	(90,982)	133,037
Proceeds from Sale of Other Assets, Investing Activities	0	3,688
Payments for Affordable Housing Programs	(7,252)	(6,094)
Proceeds from the sale of OREO	67	659
Life insurance death benefits	7,525	674
Payment to Acquire Life Insurance Policy, Investing Activities	(7,500)	0
Purchases of premises and equipment	(3,740)	(7,814)
Net cash used in investing activities	(318,391)	(184,379)
Financing activities:
Net increase in deposits	219,870	744,350
Increase (Decrease) in Other Deposits	173,261	(102,053)
Net decrease in short-term borrowings	(66,987)	(56,369)
Repayments of Long-term Debt	0	(5,000)
Payment, Tax Withholding, Share-based Payment Arrangement	(2,451)	(2,244)
Cash dividends paid	(34,533)	(37,526)
Net cash provided by financing activities	289,160	541,158
Increase in cash and cash equivalents	27,261	436,950
Cash and cash equivalents at beginning of year	219,180	370,474
Cash and cash equivalents at end of period	246,441	807,424
Supplemental disclosures of cash flow information:
Cash paid for interest	7,904	9,050
Income Taxes Paid	10,500	9,350
Non cash activities:
Real Estate Owned, Transfer to Real Estate Owned	1,409	78
Transfer of Portfolio Loans and Leases to Held-for-sale	6,321	0
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	4,182	180
Affordable Housing Program Obligation, Period Increase (Decrease)	0	10,000
Debt Securities [Member]
Non cash activities:
Transfer to Investments	0	38,163
Equity
Non cash activities:
Transfer to Investments	15,000	0
Other Investments
Payments to Acquire Investments [Abstract]
Payments to Acquire Other Investments	339	2,611
Consumer Portfolio Segment [Member]
Changes in assets and liabilities:
Increase in prepaid dealer premiums	(4,795)	(2,412)
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	$ (3,227)	$ (11,007)