Consolidated Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets:
Cash and due from banks	$ 136,178	$ 135,567
Money market instruments	597,316	24,389
Cash and cash equivalents	733,494	159,956
Marketable Securities [Abstract]
Debt Securities, Available-for-sale, Current	1,088,221	1,209,701
Other Investments and Securities, at Cost	64,965	69,806
Total investment securities	1,153,186	1,279,507
Loan balance	7,204,445	6,501,404
Allowance for loan losses	(73,476)	(56,679)
Net loans	7,130,969	6,444,725
Bank owned life insurance	214,641	212,529
Prepaid assets	107,695	101,990
Goodwill	159,595	159,595
Other intangible assets	10,310	11,523
Premises and equipment, net	81,760	73,322
Affordable housing tax credit investments	59,412	53,070
Other real estate owned	1,356	4,029
Interest Receivable	26,299	24,217
Operating Lease, Right-of-Use Asset	19,506	13,714
Mortgage loan servicing rights	9,505	10,070
Other	5,266	10,130
Total assets	9,712,994	8,558,377
Liabilities and Shareholders' Equity:
Noninterest bearing	2,518,437	1,959,935
Interest bearing	5,643,463	5,092,677
Total deposits	8,161,900	7,052,612
Short-term borrowings	291,910	230,657
Long-term debt	137,500	192,500
Subordinated debentures and notes	15,000	15,000
Unfunded commitments in affordable housing tax credit investments	31,763	25,894
Operating Lease, Liability	20,237	14,482
Accrued interest payable	2,271	2,927
Other	50,819	55,291
Total liabilities	8,711,400	7,589,363
Shareholders' equity:
Preferred shares (200,000 shares authorized; 0 shares issued)	0	0
Common shares (No par value; 20,000,000 shares authorized; 17,623,185 shares issued at June 30, 2020 and 17,623,199 shares issued at December 31, 2019)	457,966	459,389
Retained earnings	662,311	646,847
Treasury shares (1,326,760 shares at June 30, 2020 and 1,276,757 shares at December 31, 2019)	(132,544)	(127,633)
Accumulated other comprehensive income (loss), net of taxes	13,861	(9,589)
Total shareholders' equity	1,001,594	969,014
Total liabilities and shareholders' equity	$ 9,712,994	$ 8,558,377