Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 397,848	$ 395,175
Interest bearing funds with Federal Reserve Bank	460,928	527,090
Interest earning deposits with banks	26,311	18,720
Federal funds sold and securities purchased under resale agreements	47,846	58,060
Trading account assets, at fair value	3,820	9,314
Mortgage loans held for sale, at fair value	48,024	51,545
Other loans held for sale	11,356	0
Investment securities available for sale, at fair value	3,987,069	3,718,195
Loans, net of deferred fees and costs	24,787,464	23,856,391
Allowance for loan losses	(249,268)	(251,758)
Loans, net	24,538,196	23,604,633
Premises and equipment, net	426,813	417,485
Goodwill	57,315	59,678
Other intangible assets	11,254	13,223
Other real estate	3,758	22,308
Deferred tax asset, net	165,788	395,356
Other assets	1,035,511	813,220
Total assets	31,221,837	30,104,002
Liabilities
Non-interest bearing deposits	7,686,339	7,085,804
Interest bearing deposits, excluding brokered deposits	16,500,436	16,183,273
Brokered deposits	1,961,125	1,378,983
Total deposits	26,147,900	24,648,060
Federal funds purchased and securities sold under repurchase agreements	161,190	159,699
Long-term debt	1,706,138	2,160,881
Other liabilities	245,043	207,438
Total liabilities	28,260,271	27,176,078
Shareholders' Equity
Series C Preferred Stock – no par value. 5,200,000 shares outstanding at December 31, 2017 and December 31, 2016	125,980	125,980
Common stock - $1.00 par value. Authorized 342,857,143 shares at December 31, 2017 and December 31, 2016; issued 142,677,449 at December 31, 2017 and 142,025,720 at December 31, 2016; outstanding 118,897,295 at December 31, 2017 and 122,266,106 at December 31, 2016	142,678	142,026
Additional paid-in capital	3,043,129	3,028,405
Treasury stock, at cost – 23,780,154 shares at December 31, 2017 and 19,759,614 shares at December 31, 2016	(839,674)	(664,595)
Accumulated other comprehensive loss, net	(54,754)	(55,659)
Retained earnings	544,207	351,767
Total shareholders’ equity	2,961,566	2,927,924
Total liabilities and shareholders' equity	$ 31,221,837	$ 30,104,002