Consolidated Statements Of Condition - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 267,194	$ 271,454
Federal funds sold and securities purchased under resale agreements	2,851	4,341
Interest bearing deposits with banks	980,457	607,782
Available-for-sale securities, at fair value	1,724,667	1,716,388
Held-to-maturity securities, at amortized cost ($607.6 million and $878.1 million fair value at December 31, 2016 and 2015, respectively)	635,705	884,826
Trading account securities	1,989	448
Federal Home Loan Bank and Federal Reserve Bank stock	133,494	101,581
Brokerage customer receivables	25,181	27,631
Mortgage loans held-for-sale	418,374	388,038
Loans, net of unearned income, excluding covered loans	19,703,172	17,118,117
Covered loans	58,145	148,673
Total loans	19,761,317	17,266,790
Allowance for loan losses	(122,291)	(105,400)
Allowance for covered loan losses	(1,322)	(3,026)
Net loans	19,637,704	17,158,364
Premises and equipment, net	597,301	592,256
Lease investments, net	129,402	63,170
Accrued interest receivable and other assets	593,796	597,099
Goodwill	498,587	471,761
Other intangible assets	21,851	24,209
Total assets	25,668,553	22,909,348
Deposits:
Non-interest bearing	5,927,377	4,836,420
Interest bearing	15,731,255	13,803,214
Total deposits	21,658,632	18,639,634
Federal Home Loan Bank advances	153,831	853,431
Other borrowings	262,486	265,785
Subordinated notes	138,971	138,861
Junior subordinated debentures	253,566	268,566
Trade date securities payable	0	538
Accrued interest payable and other liabilities	505,450	390,259
Total liabilities	22,972,936	20,557,074
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, 2016 and 2015; 51,978,289 shares issued at December 31, 2016 and 48,468,894 shares issued at December 31, 2015	51,978	48,469
Surplus	1,365,781	1,190,988
Treasury stock, at cost, 97,749 shares at December 31, 2016 and 85,615 shares at December 31, 2015	(4,589)	(3,973)
Retained earnings	1,096,518	928,211
Accumulated other comprehensive loss	(65,328)	(62,708)
Total shareholders’ equity	2,695,617	2,352,274
Total liabilities and shareholders’ equity	25,668,553	22,909,348
Series C - $1,000 liquidation value; 126,257 and 126,287 shares issued and outstanding at December 31, 2016 and 2015, respectively
Preferred stock, no par value; 20,000,000 shares authorized:
Preferred stock, Series C and Series D	126,257	126,287
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at December 31 2016 and December 31, 2015
Preferred stock, no par value; 20,000,000 shares authorized:
Preferred stock, Series C and Series D	$ 125,000	$ 125,000