Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 356,047	$ 374,921
Interest-bearing deposits in other financial institutions	240,010	79,764
Federal funds sold and securities purchased under agreements to resell	14,250	19,000
Investment securities held to maturity, at amortized cost	1,253,494	1,168,230
Investment securities available for sale, at fair value	4,846,088	4,967,414
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	140,215	147,240
Loans held for sale	230,795	124,915
Loans	19,844,005	18,714,343
Allowance for loan losses	(269,540)	(274,264)
Loans, net	19,574,465	18,440,079
Premises and equipment, net	329,726	267,606
Goodwill	971,951	968,844
Mortgage servicing rights, net	58,414	61,341
Other intangible assets, net	15,902	16,458
Trading assets	60,780	32,192
Other assets	1,060,627	1,043,831
Total assets	29,152,764	27,711,835
LIABILITIES AND STOCKHOLDERS’ EQUITY
Noninterest-bearing demand deposits	5,337,677	5,562,466
Interest-bearing deposits	16,410,035	15,445,199
Total deposits	21,747,712	21,007,665
Federal funds purchased and securities sold under agreements to repurchase	698,772	431,438
Other short-term funding	541,321	402,978
Long-term funding	2,761,635	2,676,164
Trading liabilities	62,301	33,430
Accrued expenses and other liabilities	243,908	222,914
Total liabilities	26,055,649	24,774,589
Stockholders’ equity
Preferred equity	159,929	121,379
Common stock	1,630	1,642
Surplus	1,459,161	1,458,522
Retained earnings	1,662,778	1,593,239
Accumulated other comprehensive loss	(1,254)	(32,616)
Treasury stock, at cost	(185,129)	(204,920)
Total common equity	2,937,186	2,815,867
Total stockholders’ equity	3,097,115	2,937,246
Total liabilities and stockholders’ equity	$ 29,152,764	$ 27,711,835
Preferred shares issued (in shares)	165,000	125,114
Preferred shares authorized (par value $1.00 per share) (in shares)	750,000	750,000
Common shares issued (in shares)	163,030,209	164,200,068
Common shares authorized (par value $0.01 per share) (in shares)	250,000,000	250,000,000
Treasury shares of common stock (in shares)	11,787,605	12,960,636