CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks	$ 90,090	$ 83,232
Federal funds sold and interest bearing deposits with other banks	1,676	702
Investment securities available-for-sale (amortized cost of $819,918 and $849,139 at September 30, 2013 and December 31, 2012, respectively)	834,348	880,764
Other investments	22,409	22,609
Trading account securities	177	146
Mortgages held for sale	7,157	10,879
Loans and leases - net of unearned discount
Total loans and leases	3,468,118	3,327,553
Reserve for loan and lease losses	(84,507)	(83,311)
Net loans and leases	3,383,611	3,244,242
Equipment owned under operating leases, net	61,160	52,173
Net premises and equipment	45,466	45,016
Goodwill and intangible assets	86,629	87,502
Accrued income and other assets	117,238	123,428
Total assets	4,649,961	4,550,693
Deposits:
Noninterest bearing	725,263	646,380
Interest bearing	2,954,153	2,977,967
Total deposits	3,679,416	3,624,347
Short-term borrowings:
Federal funds purchased and securities sold under agreements to repurchase	147,991	158,680
Other short-term borrowings	73,451	10,508
Total short-term borrowings	221,442	169,188
Long-term debt and mandatorily redeemable securities	58,440	71,021
Subordinated notes	58,764	58,764
Accrued expenses and other liabilities	53,670	68,718
Total liabilities	4,071,732	3,992,038
SHAREHOLDERS' EQUITY
Preferred stock; no par value Authorized 10,000,000 shares; none issued or outstanding
Common stock; no par value Authorized 40,000,000 shares; issued 25,641,887 at September 30, 2013 and December 31, 2012	346,535	346,535
Retained earnings	252,043	223,715
Cost of common stock in treasury (1,319,336 shares at September 30, 2013 and 1,399,261 shares at December 31, 2012)	(29,362)	(31,134)
Accumulated other comprehensive income	9,013	19,539
Total shareholders' equity	578,229	558,655
Total liabilities and shareholders' equity	4,649,961	4,550,693
Commercial and agricultural loans
Loans and leases - net of unearned discount
Total loans and leases	652,180	639,069
Reserve for loan and lease losses	(12,012)	(12,326)
Auto, light truck and environmental equipment
Loans and leases - net of unearned discount
Total loans and leases	452,405	438,147
Reserve for loan and lease losses	(10,349)	(9,584)
Medium and heavy duty truck
Loans and leases - net of unearned discount
Total loans and leases	192,974	172,002
Reserve for loan and lease losses	(3,403)	(3,001)
Aircraft financing
Loans and leases - net of unearned discount
Total loans and leases	704,072	696,479
Reserve for loan and lease losses	(33,814)	(34,205)
Construction equipment financing
Loans and leases - net of unearned discount
Total loans and leases	315,346	278,974
Reserve for loan and lease losses	(6,577)	(5,390)
Commercial real estate
Loans and leases - net of unearned discount
Total loans and leases	574,279	554,968
Reserve for loan and lease losses	(12,878)	(13,778)
Residential real estate
Loans and leases - net of unearned discount
Total loans and leases	455,327	438,641
Reserve for loan and lease losses	(3,890)	(3,652)
Consumer loans
Loans and leases - net of unearned discount
Total loans and leases	121,535	109,273
Reserve for loan and lease losses	$ (1,584)	$ (1,375)