Consolidated Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
Cash and due from banks	$ 112,117	$ 160,477
Money market instruments	193,964	57,791
Cash and cash equivalents	306,081	218,268
Marketable Securities [Abstract]
Debt Securities, Available-for-sale, Current	1,248,787	1,332,842
Other Investments and Securities, at Cost	90,960	96,302
Total investment securities	1,339,747	1,429,144
Loan balance	7,525,005	7,476,221
Financing Receivable, Allowance for Credit Loss	(85,084)	(83,745)
Net loans	7,439,921	7,392,476
Bank owned life insurance	233,245	231,631
Prepaid assets	167,488	165,879
Goodwill	159,595	159,595
Other intangible assets	4,332	4,652
Premises and equipment, net	73,818	74,211
Affordable housing tax credit investments	60,565	62,703
Other real estate owned	1,674	983
Interest Receivable	38,052	39,236
Operating Lease, Right-of-Use Asset	15,786	15,715
Servicing Asset	14,435	14,656
Other	26,338	27,304
Total assets	9,881,077	9,836,453
Liabilities and Shareholders' Equity:
Noninterest bearing	2,587,152	2,628,234
Interest bearing	5,718,880	5,414,332
Total deposits	8,306,032	8,042,566
Short-term borrowings	105,859	328,182
Subordinated debentures and notes	189,271	189,147
Unfunded commitments in affordable housing tax credit investments	24,674	28,768
Operating Lease, Liability	16,510	16,605
Off-Balance Sheet, Credit Loss, Liability	5,021	5,103
Accrued interest payable	5,494	6,860
Other	66,237	73,929
Total liabilities	8,719,098	8,691,160
Shareholders' equity:
Preferred shares (No par value; 200,000 shares authorized; No shares issued)	0	0
Common shares (No par value; 20,000,000 shares authorized; 17,623,104 common shares issued at March 31, 2024 and at December 31, 2023)	459,532	463,280
Retained earnings	921,101	903,877
Treasury shares (1,473,581 common shares at March 31, 2024 and 1,506,625 common shares at December 31, 2023)	(152,259)	(155,673)
Accumulated other comprehensive loss, net of taxes	(66,395)	(66,191)
Total shareholders' equity	1,161,979	1,145,293
Total liabilities and shareholders' equity	$ 9,881,077	$ 9,836,453