Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and due from banks		$ 373,380	$ 507,187
Interest-bearing deposits in other financial institutions		207,624	221,226
Federal funds sold and securities purchased under agreements to resell		7,740	148,285
Investment securities held to maturity, at amortized cost		2,205,083	2,740,511
Investment securities available for sale, at fair value		3,262,586	3,946,941
Equity securities		15,090	1,568
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost		227,347	250,534
Residential loans held for sale		136,280	64,321
Commercial loans held for sale		15,000	14,943
Loans		22,821,440	22,940,429
Allowance for loan losses		(201,371)	(238,023)
Loans, net		22,620,068	22,702,406
Bank and corporate owned life insurance		671,948	663,203
Tax credit and other investments		279,969	161,181
Premises and equipment, net		435,284	363,225
Goodwill		1,176,230	1,169,023
Mortgage servicing rights, net		67,306	68,193
Other intangible assets, net		88,301	75,836
Other assets(a)	[1]	597,242	516,538
Total assets		32,386,478	33,615,122
Liabilities and stockholders' equity
Noninterest-bearing demand deposits		5,450,709	5,698,530
Interest-bearing deposits		18,328,355	19,198,863
Total deposits		23,779,064	24,897,393
Federal funds purchased and securities sold under agreements to repurchase		433,097	111,651
Commercial paper		32,016	45,423
FHLB advances		3,180,967	3,574,371
Other long-term funding		549,343	795,611
Accrued expenses and other liabilities(a)		489,868	409,787
Total liabilities		28,464,355	29,834,235
Stockholders’ equity
Preferred equity		256,716	256,716
Common stock		1,752	1,752
Surplus		1,716,431	1,712,615
Retained earnings		2,380,867	2,181,414
Accumulated other comprehensive income (loss)		(33,183)	(124,972)
Treasury stock, at cost		(400,460)	(246,638)
Total common equity		3,665,407	3,524,171
Total stockholders’ equity		3,922,124	3,780,888
Total liabilities and stockholders’ equity		$ 32,386,478	$ 33,615,122
Preferred shares authorized (par value $1.00 per share)		750,000	750,000
Preferred shares issued and outstanding		264,458	264,458
Common shares authorized (par value $0.01 per share)		250,000,000	250,000,000
Common shares issued		175,216,409	175,216,409
Common shares outstanding		157,171,247	164,440,471

[1] (a) During the third quarter of 2019, the Corporation made a change in accounting policy to offset derivative assets and liabilities and cash collateral with the same counterparty where it has a legally enforceable master netting agreement in place. The change had no impact on either earnings or equity. The Corporation believes that this change is a preferable method of accounting as it provides a better reflection of the assets and liabilities on the face of the consolidated balance sheets. Adoption of this change was voluntary and has been adopted retrospectively with all prior periods presented herein revised.