(Classification Of Investment Property Leases) (Details)	12 Months Ended
	Dec. 31, 2012
Property Subject to or Available for Operating Lease [Line Items]
Weighted Average Remaining Lease Term	12 years
Operating [Member]
Property Subject to or Available for Operating Lease [Line Items]
Number of properties leased	1,604
Direct Financing [Member]
Property Subject to or Available for Operating Lease [Line Items]
Number of properties leased	13
Building Portion - Direct Financing / Land Portion - Operating [Member]
Property Subject to or Available for Operating Lease [Line Items]
Number of properties leased	5