Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 374,921	$ 444,113
Interest-bearing deposits in other financial institutions	79,764	571,924
Federal funds sold and securities purchased under agreements to resell	19,000	16,030
Investment securities held to maturity, at amortized cost	1,168,230	404,455
Investment securities available for sale, at fair value	4,967,414	5,396,812
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	147,240	189,107
Loans held for sale	124,915	154,935
Loans	18,714,343	17,593,846
Allowance for loan losses	(274,264)	(266,302)
Loans, net	18,440,079	17,327,544
Premises and equipment, net	267,606	274,688
Goodwill	968,844	929,168
Mortgage servicing rights	61,341	60,145
Other intangible assets	16,458	7,437
Trading assets	32,192	35,163
Other assets	1,047,017	1,010,253
Total assets	27,715,021	26,821,774
LIABILITIES AND STOCKHOLDERS’ EQUITY
Noninterest-bearing demand deposits	5,562,466	4,505,272
Interest-bearing deposits	15,445,199	14,258,232
Total deposits	21,007,665	18,763,504
Federal funds purchased and securities sold under agreements to repurchase	431,438	493,991
Other short-term funding	402,978	574,297
Long-term funding	2,679,350	3,930,117
Trading liabilities	33,430	37,329
Accrued expenses and other liabilities	222,914	222,285
Total liabilities	24,777,775	24,021,523
Stockholders’ equity
Preferred equity	121,379	59,727
Common stock	1,642	1,665
Surplus	1,458,522	1,484,933
Retained earnings	1,593,239	1,497,818
Accumulated other comprehensive loss	(32,616)	(4,850)
Treasury stock, at cost	(204,920)	(239,042)
Total stockholders’ equity	2,937,246	2,800,251
Total liabilities and stockholders’ equity	$ 27,715,021	$ 26,821,774
Preferred shares issued (in shares)	125,114	61,356
Preferred shares authorized (par value $1.00 per share) (in shares)	750,000	750,000
Common shares issued (in shares)	164,200,068	166,544,252
Common shares authorized (par value $0.01 per share) (in shares)	250,000,000	250,000,000
Treasury shares of common stock (in shares)	12,960,636	15,002,318