Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 375,369	$ 444,113
Interest-bearing deposits in other financial institutions	101,573	571,924
Federal funds sold and securities purchased under agreements to resell	39,850	16,030
Investment securities held to maturity, at amortized cost	532,382	404,455
Investment securities available for sale, at fair value	5,407,998	5,396,812
Federal Home Loan Bank (FHLB) and Federal Reserve Bank stocks, at cost	160,765	189,107
Loans held for sale	151,146	154,935
Loans	18,303,252	17,593,846
Allowance for loan losses	(261,538)	(266,302)
Loans, net	18,041,714	17,327,544
Premises and equipment, net	274,338	274,688
Goodwill	968,844	929,168
Other intangible assets, net	79,055	67,582
Trading assets	35,386	35,163
Other assets	1,016,725	1,010,253
Total assets	27,185,145	26,821,774
LIABILITIES AND STOCKHOLDERS’ EQUITY
Noninterest-bearing demand deposits	4,332,171	4,505,272
Interest-bearing deposits	14,937,392	14,258,232
Total deposits	19,269,563	18,763,504
Federal funds purchased and securities sold under agreements to repurchase	689,699	493,991
Other short-term funding	905,837	574,297
Long-term funding	3,179,734	3,930,117
Trading liabilities	37,169	37,329
Accrued expenses and other liabilities	198,752	222,285
Total liabilities	24,280,754	24,021,523
Stockholders’ equity
Preferred equity	122,015	59,727
Common stock	1,642	1,665
Surplus	1,450,200	1,484,933
Retained earnings	1,538,684	1,497,818
Accumulated other comprehensive income (loss)	2,594	(4,850)
Treasury stock, at cost	(210,744)	(239,042)
Total stockholders’ equity	2,904,391	2,800,251
Total liabilities and stockholders’ equity	$ 27,185,145	$ 26,821,774
Preferred shares issued (in shares)	125,660	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)	13,337,783	15,002,318