Consolidated Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets:
Cash and due from banks	$ 118,884	$ 122,811
Money market instruments	331,468	23,635
Cash and cash equivalents	450,352	146,446
Investment securities:
Securities available-for-sale, at fair value (amortized cost of $1,163,893 and $1,262,761 at September 30, 2017 and December 31, 2016, respectively)	1,166,562	1,258,139
Securities held-to-maturity, at amortized cost (fair value of $347,110 and $256,672 at September 30, 2017 and December 31, 2016, respectively)	342,665	259,833
Other investment securities	61,811	61,811
Total investment securities	1,571,038	1,579,783
Loans	5,365,877	5,271,857
Allowance for loan losses	(55,232)	(50,624)
Net loans	5,310,645	5,221,233
Bank owned life insurance	188,254	185,234
Prepaid assets	95,717	88,874
Goodwill	72,334	72,334
Premises and equipment, net	56,179	57,971
Affordable housing tax credit investments	54,355	52,947
Other real estate owned	14,366	13,926
Interest Receivable	21,246	18,822
Mortgage loan servicing rights	9,479	9,266
Other	18,730	20,750
Total assets	7,862,695	7,467,586
Liabilities and Shareholders' Equity:
Noninterest bearing	1,568,177	1,523,417
Interest bearing	4,406,145	3,998,539
Total deposits	5,974,322	5,521,956
Short-term borrowings	192,896	394,795
Long-term debt	848,992	694,281
Subordinated debentures and notes	15,000	45,000
Unfunded commitments in affordable housing tax credit investments	21,282	14,282
Accrued interest payable	2,582	2,151
Other	48,254	52,881
Total liabilities	7,103,328	6,725,346
Shareholders' equity:
Preferred shares (200,000 shares authorized; 0 shares issued)	0	0
Common shares (No par value; 20,000,000 shares authorized; 16,150,769 shares issued at September 30, 2017 and 16,150,807 shares issued at December 31, 2016)	307,143	305,826
Retained earnings	553,434	535,631
Treasury shares (873,708 shares at September 30, 2017 and 810,089 at December 31, 2016)	(88,205)	(81,472)
Accumulated other comprehensive loss, net of taxes	(13,005)	(17,745)
Total shareholders' equity	759,367	742,240
Total liabilities and shareholders' equity	$ 7,862,695	$ 7,467,586