Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and due from banks	$ 362,048	$ 376,719
Overnight investments	4,347,336	1,107,844
Equity Securities, FV-NI	91,680	82,333
Investment securities available for sale	7,014,243	7,059,674
Investment securities held to maturity	2,816,982	30,996
Loans held for sale	124,837	67,869
Loans and leases	32,791,975	28,881,496
Less allowance for loan and lease losses	(224,314)	(225,141)
Net Loans and Leases	32,567,661	28,656,355
Premises and equipment	1,251,283	1,244,396
Other Real Estate	50,890	46,591
Income earned not collected	145,694	123,154
Goodwill	350,298	349,398
Intangible Assets, Net (Excluding Goodwill)	50,775	68,276
Other assets	783,953	610,891
Total assets	49,957,680	39,824,496
Deposits [Abstract]
Noninterest-bearing	18,014,029	12,926,796
Interest-bearing	25,417,580	21,504,440
Total deposits	43,431,609	34,431,236
Securities Sold under Agreements to Repurchase	641,487	442,956
Federal Home Loan Bank Advances	655,175	572,185
Subordinated Debt	504,518	163,412
Other Borrowings	88,470	148,318
FDIC shared-loss payable	15,601	112,395
Other liabilities	391,552	367,810
Total liabilities	45,728,412	36,238,312
Shareholders' Equity
Preferred stock - $0.01 par value (10,000,000 shares authorized; 345,000 and no shares issued and outstanding at December 31, 2020 and December 31, 2019, respectively)	339,937	0
Surplus	0	44,081
Retained earnings	3,867,252	3,658,197
Accumulated other comprehensive income (loss)	12,263	(126,723)
Total shareholders' equity	4,229,268	3,586,184
Total liabilities and shareholders' equity	49,957,680	39,824,496
Class A Common Stock
Shareholders' Equity
Common Stock, Value, Issued	8,811	9,624
Class B Common Stock
Shareholders' Equity
Common Stock, Value, Issued	$ 1,005	$ 1,005