Real Estate And Loans Receivable (Intangible Assets) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Real Estate And Lending Activities [Line Items]
Intangible lease assets	$ 53,400,000	$ 33,643,000
Capitalized lease intangibles, weighted average life (in years)	14.1
Intangible Assets [Member]
Real Estate And Lending Activities [Line Items]
Intangible lease assets	53,400,000	33,600,000
Accumulated amortization, net	43,100,000	26,800,000
Amortization expense related to intangible lease assets	5,200,000	3,200,000	4,500,000
Accelerated amortization	$ 600,000		$ 500,000