Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets:
Cash and due from banks	$ 193,501	$ 185,341
Interest-bearing deposits	69,603	72,554
Investment securities available-for-sale, at fair value	3,326,776	2,925,833
Investment securities held-to-maturity (fair value of $5,835,364 and $5,380,653)	5,568,188	5,293,918
Allowance for credit losses on investment securities held-to-maturity	(299)	0
Investment securities held-to-maturity, net	5,567,889	5,293,918
Federal Home Loan Bank and Federal Reserve Bank stock	77,594	149,046
Loans held for sale (valued under fair value option $14,000 and $35,750)	14,012	36,053
Loans and leases	21,641,215	20,036,986
Allowance for credit losses on loan and leases	(359,431)	(209,096)
Loans and leases, net	21,281,784	19,827,890
Deferred tax assets, net	81,286	61,975
Premises and equipment, net	226,743	270,413
Goodwill	538,373	538,373
Other intangible assets, net	22,383	21,917
Cash surrender value of life insurance policies	564,195	550,651
Accrued interest receivable and other assets	626,551	455,380
Total assets	32,590,690	30,389,344
Liabilities and shareholders' equity:
Non-interest-bearing	6,155,592	4,446,463
Interest-bearing	21,179,844	18,878,283
Total deposits	27,335,436	23,324,746
Securities sold under agreements to repurchase and other borrowings	995,355	1,040,431
Federal Home Loan Bank advances	133,164	1,948,476
Long-term debt	567,663	540,364
Lease liabilities	158,280	174,396
Accrued expenses and other liabilities	166,167	153,161
Total liabilities	29,356,065	27,181,574
Shareholders’ equity:
Common stock	937	937
Paid-in capital	1,109,532	1,113,250
Retained earnings	2,077,522	2,061,352
Treasury stock, at cost (3,487,389 and 1,659,749 shares)	(140,659)	(76,734)
Accumulated other comprehensive income (loss,) net of tax	42,256	(36,072)
Total shareholders' equity	3,234,625	3,207,770
Total liabilities and shareholders' equity	32,590,690	30,389,344
Series F Preferred Stock [Member]
Shareholders’ equity:
Preferred stock	$ 145,037	$ 145,037