Consolidated Statements Of Condition - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 277,534	$ 267,194
Federal funds sold and securities purchased under resale agreements	57	2,851
Interest bearing deposits with banks	1,063,242	980,457
Available-for-sale securities, at fair value	1,803,666	1,724,667
Held-to-maturity securities, at amortized cost ($812.5 million and $607.6 million fair value at December 31, 2017 and 2016, respectively)	826,449	635,705
Trading account securities	995	1,989
Federal Home Loan Bank and Federal Reserve Bank stock	89,989	133,494
Brokerage customer receivables	26,431	25,181
Mortgage loans held-for-sale	313,592	418,374
Loans, net of unearned income, excluding covered loans	21,640,797	19,703,172
Covered loans	0	58,145
Total loans	21,640,797	19,761,317
Allowance for loan losses	(137,905)	(122,291)
Allowance for covered loan losses	0	(1,322)
Net loans	21,502,892	19,637,704
Premises and equipment, net	621,895	597,301
Lease investments, net	212,335	129,402
Accrued interest receivable and other assets	567,374	593,796
Trade date securities receivable	90,014	0
Goodwill	501,884	498,587
Other intangible assets	17,621	21,851
Total assets	27,915,970	25,668,553
Deposits:
Non-interest bearing	6,792,497	5,927,377
Interest bearing	16,390,850	15,731,255
Total deposits	23,183,347	21,658,632
Federal Home Loan Bank advances	559,663	153,831
Other borrowings	266,123	262,486
Subordinated notes	139,088	138,971
Junior subordinated debentures	253,566	253,566
Accrued interest payable and other liabilities	537,244	505,450
Total liabilities	24,939,031	22,972,936
Preferred stock, no par value; 20,000,000 shares authorized:
Common stock, no par value; $1.00 stated value; 100,000,000 shares authorized at December 31, 2017 and 2016; 56,068,220 shares issued at December 31, 2017 and 51,978,289 shares issued at December 31, 2016	56,068	51,978
Surplus	1,529,035	1,365,781
Treasury stock, at cost, 103,013 shares at December 31, 2017 and 97,749 shares at December 31, 2016	(4,986)	(4,589)
Retained earnings	1,313,657	1,096,518
Accumulated other comprehensive loss	(41,835)	(65,328)
Total shareholders’ equity	2,976,939	2,695,617
Total liabilities and shareholders’ equity	27,915,970	25,668,553
Series C preferred stock
Preferred stock, no par value; 20,000,000 shares authorized:
Preferred stock, Series C and Series D	0	126,257
Series D preferred stock
Preferred stock, no par value; 20,000,000 shares authorized:
Preferred stock, Series C and Series D	$ 125,000	$ 125,000