Borrowings (Summary Of Securities Sold Under Agreements To Repurchase And Other Borrowings) (Details) - Securities sold under agreements to repurchase - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets Sold under Agreements to Repurchase [Line Items]
Total Outstanding	$ 518,733	$ 674,896
Rate	0.85%	0.47%
Original maturity of one year or less
Assets Sold under Agreements to Repurchase [Line Items]
Total Outstanding	$ 318,733	$ 474,896
Rate	0.11%	0.11%
Original maturity of greater than one year, non-callable
Assets Sold under Agreements to Repurchase [Line Items]
Total Outstanding	$ 200,000	$ 200,000
Rate	2.04%	1.32%