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, 2016	Dec. 31, 2015	Dec. 31, 2014	May 21, 2015	Apr. 03, 2014
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Proceeds from Sale of Lease Receivables		$ 20,951	$ 4,741	$ 46,092
Total minimum lease payments receivable		215,753	439,646
Estimated unguaranteed residual value of leased assets		85,247	162,669
Less deferred income	[1]	(198,302)	(411,435)
Investment in a direct financing lease, net		102,698	190,880		$ 4,700	$ 45,900
Initial direct costs		$ 1,300	$ 1,400

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