Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Interest Income
Interest and Fees on Loans and Leases	$ 398,616	$ 417,498	$ 439,012
Income on Investment Securities
Available-for-Sale	64,550	61,294	62,174
Held-to-Maturity	61,955	66,055	81,616
Deposits	10	14	41
Funds Sold	883	902	3,553
Other	702	661	1,001
Total Interest Income	526,716	546,424	587,397
Interest Expense
Deposits	15,216	32,966	68,374
Securities Sold Under Agreements to Repurchase	13,260	15,281	17,522
Funds Purchased	7	95	840
Short-Term Borrowings		62	38
Other Debt	943	1,698	2,908
Total Interest Expense	29,426	50,102	89,682
Net Interest Income	497,290	496,322	497,715
Provision for Credit Losses	(50,500)	117,800	16,000
Net Interest Income After Provision for Credit Losses	547,790	378,522	481,715
Noninterest Income
Trust and Asset Management	46,068	43,456	44,233
Mortgage Banking	14,964	17,871	13,686
Service Charges on Deposit Accounts	25,564	24,910	30,074
Fees, Exchange, and Other Service Charges	55,457	47,056	57,893
Investment Securities Gains (Losses), Net	(1,297)	9,932	(3,986)
Annuity and Insurance	3,224	3,362	6,934
Bank-Owned Life Insurance	7,784	7,388	7,015
Other	19,589	30,434	27,489
Total Noninterest Income	171,353	184,409	183,338
Noninterest Expense
Salaries and Benefits	228,293	207,329	216,106
Net Occupancy	26,244	39,533	33,800
Net Equipment	35,703	35,448	29,295
Data Processing	20,297	18,499	18,757
Professional Fees	12,895	12,186	10,071
FDIC Insurance	6,536	5,780	5,192
Other	63,621	55,032	66,006
Total Noninterest Expense	393,589	373,807	379,227
Income Before Provision for Income Taxes	325,554	189,124	285,826
Provision for Income Taxes	72,182	35,320	59,913
Net Income	253,372	153,804	225,913
Preferred Stock Dividends	2,975
Net Income Available to Common Shareholders	$ 250,397	$ 153,804	$ 225,913
Basic Earnings Per Common Share	$ 6.29	$ 3.87	$ 5.59
Diluted Earnings Per Common Share	6.25	3.86	5.56
Dividends Declared Per Common Share	$ 2.74	$ 2.68	$ 2.59
Basic Weighted Average Common Shares	39,837,798	39,726,210	40,384,328
Diluted Weighted Average Common Shares	40,053,664	39,892,107	40,649,570