Borrowings (Summary Of Securities Sold Under Agreements To Repurchase And Other Borrowings) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Total securities sold under agreements to repurchase	$ 282,005	$ 674,896
Fed funds purchased	869,825	0
Securities sold under agreements to repurchase and other borrowings	$ 1,151,830	674,896
Amount Of Extinguished Debt Agreements | loan	2
Extinguishment of Debt, Amount	$ 100,000
Gain (Loss) on Extinguishment of Debt	2,500
Original maturity of one year or less [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total securities sold under agreements to repurchase	282,005	474,896
Original maturity of greater than one year, non-callable [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Total securities sold under agreements to repurchase	$ 0	$ 200,000
Securities Sold under Agreements to Repurchase [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	0.11%	0.47%
Securities Sold under Agreements to Repurchase [Member] | Original maturity of one year or less [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	0.11%	0.11%
Securities Sold under Agreements to Repurchase [Member] | Original maturity of greater than one year, non-callable [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	0.00%	1.32%
Federal Funds Purchased [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	4.44%	0.00%
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Rate (as a percent)	3.38%	0.47%