Credit Facilities (Summary Of Costs Incurred Connection With Credit Facilities) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Line of Credit Facility [Line Items]
Credit facility interest and fees incurred	$ 345	$ 332	$ 721	$ 455
Active Credit Facilities [Member]
Line of Credit Facility [Line Items]
Credit facility interest and fees incurred	70	332	175	455
Federal Home Loan Bank Of New York [Member]
Line of Credit Facility [Line Items]
Credit facility interest and fees incurred	$ 275		$ 546