Notes Receivable and Allowance for Losses Past Due Balances Of Mezzanine And Other Notes Receivable (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Forgivable Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
30-89 days Past Due	$ 0	$ 0
More than 90 days Past Due	1,277	0
Total Past Due	1,277	0
Current	24,383	20,625
Total Notes Receivable	25,660	20,625
Mezzanine & Other Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
30-89 days Past Due	0	0
More than 90 days Past Due	11,033	9,676
Total Past Due	11,033	9,676
Current	18,055	25,933
Total Notes Receivable	29,088	35,609
Mezzanine & Other Notes Receivable [Member] | Senior Notes [Member]
Notes Receivable and Allowance for Losses [Line Items]
30-89 days Past Due	0	0
More than 90 days Past Due	0	0
Total Past Due	0	0
Current	10,150	18,052
Total Notes Receivable	10,150	18,052
Mezzanine & Other Notes Receivable [Member] | Senior Subordinated Notes [Member]
Notes Receivable and Allowance for Losses [Line Items]
30-89 days Past Due	0	0
More than 90 days Past Due	10,986	9,629
Total Past Due	10,986	9,629
Current	3,881	4,523
Total Notes Receivable	14,867	14,152
Mezzanine & Other Notes Receivable [Member] | Unsecured Notes [Member]
Notes Receivable and Allowance for Losses [Line Items]
30-89 days Past Due	0	0
More than 90 days Past Due	47	47
Total Past Due	47	47
Current	4,024	3,358
Total Notes Receivable	$ 4,071	$ 3,405