Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
ASSETS
Cash and cash equivalents	$ 352,060	$ 367,092
Interest bearing funds with Federal Reserve Bank	908,527	829,887
Interest earning deposits with banks	21,686	17,387
Federal funds sold and securities purchased under resale agreements	76,300	69,819
Trading account assets, at fair value	4,801	5,097
Mortgage loans held for sale, at fair value	62,867	59,275
Investment securities available for sale, at fair value	3,582,244	3,587,818
Loans, net of deferred fees and costs	22,758,203	22,429,565
Allowance for loan losses	(254,516)	(252,496)
Loans, net	22,503,687	22,177,069
Premises and equipment, net	439,122	445,155
Goodwill	24,431	24,431
Other real estate	38,462	47,030
Deferred tax asset, net	464,242	511,948
Other assets	692,828	650,645
Total assets	29,171,257	28,792,653
LIABILITIES AND SHAREHOLDERS' EQUITY
Non-interest bearing deposits	6,896,547	6,732,970
Interest bearing deposits, excluding brokered deposits	15,348,864	15,434,171
Brokered deposits	1,204,517	1,075,520
Total deposits	23,449,928	23,242,661
Federal funds purchased and securities sold under repurchase agreements	203,979	177,025
Long-term debt	2,360,865	2,186,893
Other liabilities	203,217	185,878
Total liabilities	26,217,989	25,792,457
Shareholders' Equity
Series C Preferred Stock – no par value. Authorized 100,000,000 shares; 5,200,000 shares issued and outstanding at March 31, 2016 and December 31, 2015	125,980	125,980
Common stock - $1.00 par value. Authorized 342,857,143 shares; 140,793,916 issued at March 31, 2016 and 140,592,409 issued at December 31, 2015; 125,849,939 outstanding at March 31, 2016 and 129,547,032 outstanding at December 31, 2015	140,794	140,592
Additional paid-in capital	2,989,854	2,989,981
Treasury stock, at cost – 14,943,977 shares at March 31, 2016 and 11,045,377 shares at December 31, 2015	(512,496)	(401,511)
Accumulated other comprehensive loss, net	(740)	(29,819)
Retained earnings	209,876	174,973
Total shareholders’ equity	2,953,268	3,000,196
Total liabilities and shareholders' equity	$ 29,171,257	$ 28,792,653