Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 337,814	$ 362,048
Overnight investments	9,114,660	4,347,336
Equity Securities, FV-NI	97,528	91,680
Investment securities available for sale	9,203,427	7,014,243
Investment securities held to maturity	3,809,453	2,816,982
Loans held for sale	98,741	124,837
Loans and leases	32,371,522	32,791,975
Less allowance for loan and lease losses	(178,493)	(224,314)
Net Loans and Leases	32,193,029	32,567,661
Premises and equipment	1,233,418	1,251,283
Other Real Estate	39,328	50,890
Income earned not collected	134,237	145,694
Goodwill	346,064	350,298
Intangible Assets, Net (Excluding Goodwill)	43,085	50,775
Total other assets	1,657,356	783,953
Total assets	58,308,140	49,957,680
Deposits [Abstract]
Noninterest-bearing	21,404,808	18,014,029
Interest-bearing	30,001,286	25,417,580
Total deposits	51,406,094	43,431,609
Securities Sold under Agreements to Repurchase	589,101	641,487
Federal Home Loan Bank Advances	644,659	655,175
Subordinated Debt	477,564	504,518
Other Borrowings	72,155	88,470
FDIC shared-loss payable	0	15,601
Other liabilities	381,326	391,552
Total liabilities	53,570,899	45,728,412
Shareholders' Equity
Preferred stock - $0.01 par value and liquidation preference of $1,000 per share (10,000,000 shares authorized; 345,000 shares issued and outstanding at December 31, 2021 and December 31, 2020)	339,937	339,937
Retained earnings	4,377,712	3,867,252
Accumulated other comprehensive income	9,776	12,263
Total shareholders' equity	4,737,241	4,229,268
Total liabilities and shareholders' equity	58,308,140	49,957,680
Class A Common Stock, Par Value $1
Shareholders' Equity
Common Stock, Value, Issued	8,811	8,811
Class B Common Stock
Shareholders' Equity
Common Stock, Value, Issued	$ 1,005	$ 1,005