Borrowings (Short-Term Borrowings) (Details) - Federal Funds Purchased And Repurchase Agreements [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Year End Weighted Rate	0.06%	0.04%	0.80%
Average Weighted Rate	0.10%	0.30%	1.60%
Average Balance Outstanding	$ 2,334,837	$ 1,966,479	$ 1,822,098
Maximum Outstanding at any Month End	3,022,967	2,314,756	2,394,294
Balance at December 31	$ 3,022,967	$ 2,098,383	$ 1,850,772