Consolidated Statements Of Condition - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Assets
Cash and due from banks	$ 296,105	$ 267,194	$ 267,551
Federal funds sold and securities purchased under resale agreements	56	2,851	4,024
Interest bearing deposits with banks	1,011,635	980,457	693,269
Available-for-sale securities, at fair value	1,649,636	1,724,667	637,663
Held-to-maturity securities, at amortized cost ($787.5 million, $607.6 million and $1.0 billion fair value at June 30, 2017, December 31, 2016 and June 30, 2016 respectively)	793,376	635,705	992,211
Trading account securities	1,987	1,989	3,613
Federal Home Loan Bank and Federal Reserve Bank stock	80,812	133,494	121,319
Brokerage customer receivables	23,281	25,181	26,866
Mortgage loans held-for-sale	382,837	418,374	554,256
Loans, net of unearned income, excluding covered loans	20,743,332	19,703,172	18,174,655
Covered loans	50,119	58,145	105,248
Total loans	20,793,451	19,761,317	18,279,903
Allowance for loan losses	(129,591)	(122,291)	(114,356)
Allowance for covered loan losses	(1,074)	(1,322)	(2,412)
Net loans	20,662,786	19,637,704	18,163,135
Premises and equipment, net	605,211	597,301	595,792
Lease investments, net	191,248	129,402	103,749
Accrued interest receivable and other assets	577,359	593,796	670,014
Trade date securities receivable	133,130	0	1,079,238
Goodwill	500,260	498,587	486,095
Other intangible assets	19,546	21,851	21,821
Total assets	26,929,265	25,668,553	24,420,616
Deposits:
Non-interest bearing	6,294,052	5,927,377	5,367,672
Interest bearing	16,311,640	15,731,255	14,674,078
Total deposits	22,605,692	21,658,632	20,041,750
Federal Home Loan Bank advances	318,270	153,831	588,055
Other borrowings	277,710	262,486	252,611
Subordinated notes	139,029	138,971	138,915
Junior subordinated debentures	253,566	253,566	253,566
Trade date securities payable	5,151	0	40,000
Accrued interest payable and other liabilities	490,389	505,450	482,124
Total liabilities	24,089,807	22,972,936	21,797,021
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 June 30, 2017, December 31, 2016 and June 30, 2016; 55,801,665 shares issued at June 30, 2017, 51,978,289 shares issued at December 31, 2016 and 51,708,585 shares issued at June 30, 2016	55,802	51,978	51,708
Surplus	1,511,080	1,365,781	1,350,751
Treasury stock, at cost, 101,738 shares at June 30, 2017, 97,749 shares at December 31, 2016, and 89,430 shares at June 30, 2016	(4,884)	(4,589)	(4,145)
Retained earnings	1,198,997	1,096,518	1,008,464
Accumulated other comprehensive loss	(46,537)	(65,328)	(34,440)
Total shareholders’ equity	2,839,458	2,695,617	2,623,595
Total liabilities and shareholders’ equity	26,929,265	25,668,553	24,420,616
Series C - $1,000 liquidation value; no shares issued and outstanding at June 30, 2017, and 126,257 shares issued and outstanding at December 31, 2016 and June 30, 2016, respectively
Preferred stock, no par value; 20,000,000 shares authorized:
Preferred stock, Series C and Series D	0	126,257	126,257
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at June 30, 2017, December 31, 2016 and June 30, 2016, respectively
Preferred stock, no par value; 20,000,000 shares authorized:
Preferred stock, Series C and Series D	$ 125,000	$ 125,000	$ 125,000