Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets
Cash and due from banks	$ 334,138	$ 343,831
Interest-bearing deposits in other financial institutions	166,929	681,684
Debt Securities, Available-for-sale		4,332,015
Investment securities HTM, net, at amortized cost	3,939,855	2,238,947
Equity securities	18,560	18,352
Federal Home Loan Bank and Federal Reserve Bank stocks, at cost	168,281	168,281
Residential loans held for sale	91,582	136,638
Loans	24,531,926	24,224,949
Allowance for loan losses	(279,058)	(280,015)
Loans, net	24,252,867	23,944,934
Tax credit and other investments	284,561	293,733
Premises and equipment, net	387,550	385,173
Bank and corporate owned life insurance	679,538	680,021
Goodwill	1,104,992	1,104,992
Other intangible assets, net	55,890	58,093
Mortgage servicing rights, net(a)	67,015	54,862
Interest receivable	83,120	80,528
Other assets	540,218	582,168
Total assets	34,955,900	35,104,253
Liabilities and Stockholders' Equity
Noninterest-bearing demand deposits	8,315,699	8,504,077
Interest-bearing deposits	20,089,710	19,962,353
Total deposits	28,405,409	28,466,430
Federal funds purchased and securities sold under agreements to repurchase	368,768	319,532
Commercial paper	30,593	34,730
FHLB advances	1,537,948	1,621,047
Allowance for unfunded commitments	38,776	39,776
Accrued expenses and other liabilities	376,322	348,560
Total liabilities	31,007,613	31,079,399
Stockholders’ Equity
Preferred equity	193,195	193,195
Common stock	1,752	1,752
Surplus	1,708,104	1,713,851
Retained earnings	2,715,118	2,672,601
Accumulated other comprehensive (loss)	(137,024)	(10,317)
Treasury stock, at cost	(532,858)	(546,229)
Total common equity	3,755,092	3,831,658
Total stockholders’ equity	3,948,287	4,024,853
Total liabilities and stockholders’ equity	$ 34,955,900	$ 35,104,253
Preferred shares authorized (par value $1.00 per share)	750,000	750,000
Preferred shares issued and outstanding	200,000	200,000
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	150,037,780	149,342,641
Preferred shares, par value	$ 1.00	$ 1.00
Common shares, par value	$ 0.01	$ 0.01
Investment securities AFS, at fair value	$ 2,780,803	$ 4,332,015
Fair Value, Inputs, Level 2
Assets
Debt Securities, Available-for-sale	2,664,671	4,209,058
Other long-term funding	$ 249,797	$ 249,324