Fair Value of Financial Instruments (Reconciliation Of Fair Valued Assets Measured On A Recurring Basis) (Details) - Fair Value, Inputs, Level 3 [Member] - Fair Value, Measurements, Recurring [Member] - Collateralized debt obligations [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 16,230	$ 11,952	$ 13,260	$ 14,354
Total losses realized/unrealized: Included in other comprehensive income loss	862	808	3,832	(1,594)
Ending balance	$ 17,092	$ 12,760	$ 17,092	$ 12,760