Consolidated Balance Sheets - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks		$ 396,677	$ 446,558
Interest-bearing deposits in other financial institutions		126,232	149,175
Federal funds sold and securities purchased under agreements to resell		43,000	46,500
Investment securities held to maturity, at amortized cost		2,255,395	1,273,536
Investment securities available for sale, at fair value		3,687,470	4,680,226
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost		181,180	140,001
Residential loans held for sale	[1]	41,620	108,010
Commercial loans held for sale		4,772	12,474
Loans		20,783,069	20,054,716
Allowance for loan losses		(281,101)	(278,335)
Loans, net		20,501,968	19,776,381
Premises and equipment, net		328,404	330,315
Goodwill		972,006	971,951
Mortgage servicing rights		59,395	61,476
Other intangible assets		14,530	15,377
Trading assets		48,576	52,398
Other assets		1,107,800	1,074,937
Total assets		29,769,025	29,139,315
LIABILITIES AND STOCKHOLDERS’ EQUITY
Noninterest-bearing demand deposits		5,038,162	5,392,208
Interest-bearing deposits		16,580,018	16,496,240
Total deposits		21,618,180	21,888,448
Federal funds purchased and securities sold under agreements to repurchase		607,669	508,347
Other short-term funding		794,813	583,688
Long-term funding		3,262,120	2,761,795
Trading liabilities		47,143	51,103
Accrued expenses and other liabilities		247,598	254,622
Total liabilities		26,577,523	26,048,003
Stockholders’ equity
Preferred equity		159,929	159,929
Common stock		1,630	1,630
Surplus		1,474,301	1,459,498
Retained earnings		1,747,632	1,695,764
Accumulated other comprehensive income (loss)		(53,470)	(54,679)
Treasury stock, at cost		(138,520)	(170,830)
Total common equity		3,031,573	2,931,383
Total stockholders’ equity		3,191,502	3,091,312
Total liabilities and stockholders’ equity		$ 29,769,025	$ 29,139,315
Preferred shares issued (in shares)		165,000	165,000
Preferred shares authorized (par value $1.00 per share) (in shares)		750,000	750,000
Common shares issued (in shares)		163,030,209	163,030,209
Common shares authorized (par value $0.01 per share) (in shares)		250,000,000	250,000,000
Treasury shares of common stock (in shares)		9,181,834	10,909,362

[1] (1)Effective January 1, 2017, residential loans originated for sale are accounted for under the fair value option. Prior periods have not been restated. For more information on this accounting policy change, please refer to Note 3 to the Notes to the Consolidated Financial Statements.