Investments In Direct Financing Lease (Summary Of Carrying Amounts Of Investment In Direct Financing Lease, Net) (Details) (USD $)	Mar. 31, 2013		Dec. 31, 2012
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Total minimum lease payments receivable	$ 642,798,000		$ 648,632,000
Estimated unguaranteed residual value of leased assets	211,944,000		211,944,000
Less deferred income	(619,440,000)	[1]	(626,487,000)	[1]
Investment in a direct financing lease, net	235,302,000		234,089,000
Capital Leases, Net Investment in Direct Financing Leases, Initial Direct Costs	$ 1,700,000		$ 1,700,000

[1] Deferred income is net of $1.7 million of initial direct costs at March 31, 2013 and December 31, 2012, respectively.