Investments In Direct Financing Leases (Summary Of Carrying Amounts Of Investment In Direct Financing Lease, Net) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jul. 26, 2018
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Proceeds from Sale of Lease Receivables		$ 43,447	$ 0	$ 20,951
Total minimum lease payments receivable		36,352	112,411
Estimated unguaranteed residual value of leased assets		16,509	47,000
Less deferred income	[1]	(32,303)	(101,508)
Investment in direct financing leases, net		20,558	57,903		$ 37,900
Initial direct costs		$ 300	$ 800

[1] Deferred income is net of $0.3 million and $0.8 million of initial direct costs at December 31, 2018 and 2017, respectively