Notes Receivable And Allowance For Losses Past Due Balances Of Mezzanine And Other Notes Receivable (Details) (Notes Receivable [Member], USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Financing Receivable 30-89 days Past Due	$ 0	$ 0
Financing Receivable >90 days Past Due	12,026	10,931
Financing Receivable Total Past Due	12,026	10,931
Financing Receivable, Current	7,089	7,409
Total Receivables	19,115	18,340
Senior Notes [Member]
Financing Receivable 30-89 days Past Due	0	0
Financing Receivable >90 days Past Due	0	0
Financing Receivable Total Past Due	0	0
Financing Receivable, Current	4,425	3,846
Total Receivables	4,425	3,846
Senior Subordinated Notes [Member]
Financing Receivable 30-89 days Past Due	0	0
Financing Receivable >90 days Past Due	12,026	10,931
Financing Receivable Total Past Due	12,026	10,931
Financing Receivable, Current	2,664	3,563
Total Receivables	$ 14,690	$ 14,494