Consolidated Statements Of Condition - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Assets
Cash and due from banks	$ 304,580	$ 277,534	$ 296,105
Federal funds sold and securities purchased under resale agreements	62	57	56
Interest bearing deposits with banks	1,221,407	1,063,242	1,011,635
Available-for-sale securities, at fair value	1,940,787	1,803,666	1,649,636
Held-to-maturity securities, at amortized cost ($851.8 million, $812.5 million and $787.5 million fair value at June 30, 2018, December 31, 2017 and June 30, 2017 respectively)	890,834	826,449	793,376
Trading account securities	862	995	1,987
Equity securities with readily determinable fair value	37,839	0	0
Federal Home Loan Bank and Federal Reserve Bank stock	96,699	89,989	80,812
Brokerage customer receivables	16,649	26,431	23,281
Mortgage loans held-for-sale, at fair value	455,712	313,592	382,837
Loans, net of unearned income, excluding covered loans	22,610,560	21,640,797	20,743,332
Covered loans	0	0	50,119
Total loans	22,610,560	21,640,797	20,793,451
Allowance for loan losses	(143,402)	(137,905)	(129,591)
Allowance for covered loan losses	0	0	(1,074)
Net loans	22,467,158	21,502,892	20,662,786
Premises and equipment, net	639,345	621,895	605,211
Lease investments, net	194,160	212,335	191,248
Accrued interest receivable and other assets	666,673	567,374	577,359
Trade date securities receivable	450	90,014	133,130
Goodwill	509,957	501,884	500,260
Other intangible assets	21,414	17,621	19,546
Total assets	29,464,588	27,915,970	26,929,265
Deposits:
Non-interest bearing	6,520,724	6,792,497	6,294,052
Interest bearing	17,844,755	16,390,850	16,311,640
Total deposits	24,365,479	23,183,347	22,605,692
Federal Home Loan Bank advances	667,000	559,663	318,270
Other borrowings	255,701	266,123	277,710
Subordinated notes	139,148	139,088	139,029
Junior subordinated debentures	253,566	253,566	253,566
Trade date securities payable	0	0	5,151
Accrued interest payable and other liabilities	676,823	537,244	490,389
Total liabilities	26,357,717	24,939,031	24,089,807
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, 2018, December 31, 2017 and June 30, 2017; 56,436,564 shares issued at June 30, 2018, 56,068,220 shares issued at December 31, 2017 and 55,801,665 shares issued at June 30, 2017	56,437	56,068	55,802
Surplus	1,547,511	1,529,035	1,511,080
Treasury stock, at cost, 107,288 shares at June 30, 2018, 103,013 shares at December 31, 2017, and 101,738 shares at June 30, 2017	(5,355)	(4,986)	(4,884)
Retained earnings	1,464,494	1,313,657	1,198,997
Accumulated other comprehensive loss	(81,216)	(41,835)	(46,537)
Total shareholders’ equity	3,106,871	2,976,939	2,839,458
Total liabilities and shareholders’ equity	29,464,588	27,915,970	26,929,265
Series D - $25 liquidation value; 5,000,000 shares issued and outstanding at June 30, 2018, December 31, 2017 and June 30, 2017
Preferred stock, no par value; 20,000,000 shares authorized:
Preferred stock, Series C and Series D	$ 125,000	$ 125,000	$ 125,000