Investments In Direct Financing Lease (Summary Of Carrying Amounts Of Investment In Direct Financing Lease, Net) (Details) $ in Thousands		3 Months Ended
		Mar. 31, 2017 USD ($) years	Dec. 31, 2016 USD ($)
Total minimum lease payments receivable		$ 213,065	$ 215,753
Estimated unguaranteed residual value of leased assets		85,247	85,247
Less deferred income	[1]	(195,217)	(198,302)
Investment in a direct financing lease, net		103,095	102,698
Capital Leases, Net Investment in Direct Financing Leases, Initial Direct Costs		$ 1,300	$ 1,300
Minimum [Member]
Length of lease (in years) | years		15
Maximum [Member]
Length of lease (in years) | years		18

[1] Deferred income is net of $1.3 million of initial direct costs at March 31, 2017 and December 31, 2016.