Notes Receivable And Allowance For Losses Narrative (Details) (USD $)	1 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 02, 2011
Mortgage Loans Acquired					$ 11,500,000
Payments to Acquire Mortgage Notes Receivable	7,900,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Cash Flows Expected to be Collected at Acquisition					9,700,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Commercial, Contractually Required Payments Receivable at Acquisition					12,000,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield	1,800,000	1,800,000
Certain Loans Acquired Accretable Yeild	7.36%	7.36%
Notes Receivable, Related Parties	29,840,000	29,840,000	26,093,000
Allowance for losses on non-impaired loans	9,228,000	9,228,000	10,026,000
Receivables, allowance for doubtful accounts	9,979,000	9,979,000	9,159,000
Amortization expense		8,024,000	8,342,000	8,336,000
Interest income on impaired loans, accrual method		10,000
Number Of Days Outstanding To Consider Loans Outstanding Past Due In Order To Cease Accruing Interest		30 days
Forgivable Notes Receivable
Notes Receivable, Related Parties	7,948,000	7,948,000	7,753,000
Allowance for losses on non-impaired loans	795,000	795,000	775,000
Amortization expense		2,300,000	1,900,000	2,000,000
Mezzanine & Other Notes Receivable
Notes Receivable, Related Parties	21,892,000	21,892,000	18,340,000
Allowance for losses on non-impaired loans	8,433,000	8,433,000	9,251,000
Face value of notes value deemed impaired	11,200,000	11,200,000	10,800,000
Loan reserves	8,200,000	8,200,000	8,600,000
Impaired loans, carrying value	3,000,000	3,000,000	2,200,000
Interest income on impaired loans, accrual method		0	0
Interest income on impaired loans, cash basis method		0	0
Non-impaired Loans | Mezzanine & Other Notes Receivable
Allowance for losses on non-impaired loans	$ 200,000	$ 200,000	$ 600,000