Investments In Direct Financing Lease (Summary Of Carrying Amounts Of Investment In Direct Financing Lease, Net) (Details) (USD $)	Sep. 30, 2012		Dec. 31, 2011
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Total minimum lease payments receivable	$ 654,406,000		$ 683,653,000
Estimated unguaranteed residual value of leased assets	211,944,000		215,987,000
Less deferred income	(633,495,000)	[1]	(666,021,000)	[1]
Investment in a direct financing lease, net	232,855,000		233,619,000
Capital Leases, Net Investment in Direct Financing Leases, Initial Direct Costs	$ 1,700,000		$ 1,800,000

[1] Deferred income is net of $1.7 million and $1.8 million of initial direct costs at September 30, 2012 and December 31, 2011, respectively.