Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 343,831	$ 416,154
Interest-bearing deposits in other financial institutions	681,684	298,759
Federal funds sold and securities purchased under agreements to resell	0	1,135
Fair Value	4,332,015
Investment securities AFS, at fair value	541,305	3,085,441
Investment securities HTM, net, at amortized cost	2,238,947	1,878,938
Equity securities	18,352	15,106
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	168,281	168,280
Residential loans held for sale	136,638	129,158
Loans	24,224,949	24,451,724
Allowance for loan losses	(280,015)	(383,702)
Loans, net	23,944,934	24,068,022
Tax credit and other investments	293,733	297,232
Premises and equipment, net	385,173	418,914
Bank and corporate owned life insurance	680,021	679,647
Goodwill	1,104,992	1,109,300
Other intangible assets, net	58,093	68,254
Mortgage servicing rights, net	54,862	41,961
Interest receivable	80,528	90,263
Other assets	582,168	653,219
Total assets	35,104,253	33,419,783
Liabilities and Stockholders' Equity
Noninterest-bearing demand deposits	8,504,077	7,661,728
Interest-bearing deposits	19,962,353	18,820,753
Total deposits	28,466,430	26,482,481
Federal funds purchased and securities sold under agreements to repurchase	319,532	192,971
Commercial paper	34,730	59,346
FHLB advances	1,621,047	1,632,723
Other long-term funding	1,870,371	2,182,188
Allowance for unfunded commitments	39,776	47,776
Accrued expenses and other liabilities	348,560	364,088
Total liabilities	31,079,399	29,328,850
Stockholders’ Equity
Preferred equity	193,195	353,512
Common stock	1,752	1,752
Surplus	1,713,851	1,720,329
Retained earnings	2,672,601	2,458,920
Accumulated other comprehensive income (loss)	(10,317)	12,618
Treasury stock, at cost	(546,229)	(456,198)
Total common equity	3,831,658	3,737,421
Total stockholders’ equity	4,024,853	4,090,933
Total liabilities and stockholders’ equity	$ 35,104,253	$ 33,419,783
Preferred shares authorized (par value $1.00 per share)	750,000	750,000
Preferred shares issued and outstanding	200,000	364,458
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	149,342,641	153,540,224
Other long-term funding	$ 1,870,371	$ 2,182,188
Fair Value, Inputs, Level 2
Assets
Investment securities AFS, at fair value	4,209,058	3,058,910
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	168,281	168,280
Bank and corporate owned life insurance	680,021	679,647
Liabilities and Stockholders' Equity
Other long-term funding	249,324	549,465
Other long-term funding	$ 249,324	$ 549,465