Investments In Direct Financing Lease (Summary Of Carrying Amounts Of Investment In Direct Financing Lease, Net) (Details) $ in Thousands		9 Months Ended
		Sep. 30, 2016 USD ($) years	Dec. 31, 2015 USD ($)
Total minimum lease payments receivable		$ 416,369	$ 439,646
Estimated unguaranteed residual value of leased assets		159,303	162,669
Less deferred income	[1]	(386,520)	(411,435)
Investment in a direct financing lease, net		189,152	190,880
Capital Leases, Net Investment in Direct Financing Leases, Initial Direct Costs		$ 1,300	$ 1,400
Minimum [Member]
Length of lease (in years) | years		16
Maximum [Member]
Length of lease (in years) | years		19

[1] Deferred income is net of $1.3 million and $1.4 million of initial direct costs at September 30, 2016 and December 31, 2015, respectively.