Mortgage Loans On Real Estate (Schedule Of Reconciliation On Real Estate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Abstract]
Beginning Balance	$ 45,242	$ 45,734
New mortgage loan			$ 44,695
Accrued interest	813	2,508	1,039
Repayments	$ (46,055)	(3,000)
Ending Balance		$ 45,242	$ 45,734