Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 303,701	$ 444,113
Interest-bearing deposits in other financial institutions	70,023	571,924
Federal funds sold and securities purchased under agreements to resell	36,490	16,030
Investment securities held to maturity, at amortized cost	604,799	404,455
Investment securities available for sale, at fair value	5,403,656	5,396,812
Federal Home Loan Bank (FHLB) and Federal Reserve Bank stocks, at cost	160,871	189,107
Loans held for sale	105,144	154,935
Loans	18,524,773	17,593,846
Allowance for loan losses	(262,536)	(266,302)
Loans, net	18,262,237	17,327,544
Premises and equipment, net	271,119	274,688
Goodwill	968,844	929,168
Other intangible assets, net	78,380	67,582
Trading assets	43,752	35,163
Other assets	1,158,227	1,010,253
Total assets	27,467,243	26,821,774
LIABILITIES AND STOCKHOLDERS’ EQUITY
Noninterest-bearing demand deposits	4,657,261	4,505,272
Interest-bearing deposits	15,901,134	14,258,232
Total deposits	20,558,395	18,763,504
Federal funds purchased and securities sold under agreements to repurchase	702,569	493,991
Other short-term funding	319,766	574,297
Long-term funding	2,679,542	3,930,117
Trading liabilities	45,817	37,329
Accrued expenses and other liabilities	207,357	222,285
Total liabilities	24,513,446	24,021,523
Stockholders’ equity
Preferred equity	121,379	59,727
Common stock	1,642	1,665
Surplus	1,455,034	1,484,933
Retained earnings	1,570,199	1,497,818
Accumulated other comprehensive income (loss)	15,376	(4,850)
Treasury stock, at cost	(209,833)	(239,042)
Total stockholders’ equity	2,953,797	2,800,251
Total liabilities and stockholders’ equity	$ 27,467,243	$ 26,821,774
Preferred shares issued (in shares)	125,114	61,356
Preferred shares authorized (par value $1.00 per share)	750,000	750,000
Common shares issued (in shares)	164,200,068	166,544,252
Common shares authorized (par value $0.01 per share)	250,000,000	250,000,000
Treasury shares of common stock (in shares)	13,272,472	15,002,318