Consolidated Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets:
Cash and due from banks	$ 146,155	$ 156,750
Money market instruments	115,764	32,978
Cash and cash equivalents	261,919	189,728
Marketable Securities [Abstract]
Debt Securities, Available-for-sale, Current	1,714,440	1,733,696
Other Investments and Securities, at Cost	85,970	87,091
Total investment securities	1,800,410	1,820,787
Loan balance	7,093,857	7,141,891
Financing Receivable, Allowance for Credit Loss	(85,946)	(85,379)
Net loans	7,007,911	7,056,512
Bank owned life insurance	223,528	220,072
Prepaid assets	157,426	153,579
Goodwill	159,595	159,595
Other intangible assets	5,648	5,975
Premises and equipment, net	81,223	82,126
Affordable housing tax credit investments	58,871	60,968
Other real estate owned	1,468	1,354
Interest Receivable	33,245	34,704
Operating Lease, Right-of-Use Asset	17,150	17,600
Servicing Asset	15,505	15,792
Other	33,082	36,201
Total assets	9,856,981	9,854,993
Liabilities and Shareholders' Equity:
Noninterest bearing	2,922,242	3,074,276
Interest bearing	5,372,202	5,160,439
Total deposits	8,294,444	8,234,715
Short-term borrowings	172,058	227,342
Subordinated debentures and notes	188,785	188,667
Unfunded commitments in affordable housing tax credit investments	26,723	28,132
Operating Lease, Liability	18,651	19,291
Off-Balance Sheet, Credit Loss, Liability	5,329	5,214
Accrued interest payable	1,661	3,486
Other	67,177	78,920
Total liabilities	8,774,828	8,785,767
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 shares issued at March 31, 2023 and at December 31, 2022)	459,431	462,404
Retained earnings	862,518	847,235
Treasury shares (1,449,037 shares at March 31, 2023 and 1,359,521 shares at December 31, 2022)	(149,763)	(138,019)
Accumulated other comprehensive loss, net of taxes	(90,033)	(102,394)
Total shareholders' equity	1,082,153	1,069,226
Total liabilities and shareholders' equity	$ 9,856,981	$ 9,854,993