Investments In Direct Financing Leases (Summary Of Carrying Amounts Of Investment In Direct Financing Lease, Net) (Details) (USD $)	Dec. 31, 2011		Sep. 30, 2011	Dec. 31, 2010
Capital Leases, Net Investment in Direct Financing Leases [Abstract]
Total minimum lease payments receivable	$ 683,653,000			$ 699,069,000
Estimated unguaranteed residual value of leased assets	215,987,000			213,885,000
Less deferred income	(666,021,000)	[1]		(686,521,000)	[1]
Investment in a direct financing lease, net	233,619,000		21,000,000	226,433,000
Initial direct costs	$ 1,800,000			$ 1,800,000

[1] Deferred income is net of $1.8 million of initial direct costs at December 31, 2011 and 2010.