Consolidated Balance Sheets - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks		$ 416,154	$ 373,380
Interest-bearing deposits in other financial institutions		298,759	207,624
Federal funds sold and securities purchased under agreements to resell		1,135	7,740
Investment securities AFS, at fair value		3,085,441	3,262,586
Investment securities HTM, net, at amortized cost(a)		1,878,938	2,205,083
Equity securities		15,106	15,090
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost		168,280	227,347
Residential loans held for sale		129,158	136,280
Commercial loans held for sale		0	15,000
Loans		24,451,724	22,821,440
Allowance for loan losses(a)		(383,702)	(201,371)
Loans, net		24,068,022	22,620,068
Tax credit and other investments		297,232	279,969
Premises and equipment, net		418,914	435,284
Bank and corporate owned life insurance		679,647	671,948
Goodwill		1,109,300	1,176,230
Other intangible assets, net		68,254	88,301
Mortgage servicing rights, net		41,961	67,306
Interest receivable		90,263	91,196
Other assets	[1]	653,219	506,046
Total assets		33,419,783	32,386,478
Liabilities and Stockholders' Equity
Noninterest-bearing demand deposits		7,661,728	5,450,709
Interest-bearing deposits		18,820,753	18,328,355
Total deposits		26,482,481	23,779,064
Federal funds purchased and securities sold under agreements to repurchase		192,971	433,097
Commercial paper		59,346	32,016
FHLB advances		1,632,723	3,180,967
Other long-term funding		549,465	549,343
Allowance for unfunded commitments		47,776	21,907
Accrued expenses and other liabilities		364,088	467,961
Total liabilities		29,328,850	28,464,355
Stockholders’ Equity
Preferred equity		353,512	256,716
Common stock		1,752	1,752
Surplus		1,720,329	1,716,431
Retained earnings(a)		2,458,920	2,380,867
Accumulated other comprehensive income (loss)		12,618	(33,183)
Treasury stock, at cost		(456,198)	(400,460)
Total common equity		3,737,421	3,665,407
Total stockholders’ equity		4,090,933	3,922,124
Total liabilities and stockholders’ equity		$ 33,419,783	$ 32,386,478
Preferred shares authorized (par value $1.00 per share)		750,000	750,000
Preferred shares issued and outstanding		364,458	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		153,540,224	157,171,247

[1] (a) See Note 1 Summary of Significant Accounting Policies for additional details on the adoption of ASU 2016-13.