Notes Receivable and Allowance for Losses Schedule Of Notes Receivable (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 54,748	$ 56,234
Allowance for losses on non-impaired loans	3,521	3,257
Allowance for losses on receivables specifically evaluated for impairment	8,895	8,289
Total loan reserves	12,416	11,546
Net carrying value	42,332	44,688
Current portion, net	7,287	12,816
Long-term portion, net	35,045	31,872
Forgivable Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	25,660	20,625
Allowance for losses on non-impaired loans	1,951	1,650
Allowance for losses on receivables specifically evaluated for impairment	547	0
Total loan reserves	2,498	1,650
Net carrying value	23,162	18,975
Current portion, net	65	361
Long-term portion, net	23,097	18,614
Mezzanine & Other Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	29,088	35,609
Allowance for losses on non-impaired loans	1,570	1,607
Allowance for losses on receivables specifically evaluated for impairment	8,348	8,289
Total loan reserves	9,918	9,896
Net carrying value	19,170	25,713
Current portion, net	7,222	12,455
Long-term portion, net	11,948	13,258
Senior Notes [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	10,150	18,052
Senior Notes [Member] | Forgivable Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	0	0
Senior Notes [Member] | Mezzanine & Other Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	10,150	18,052
Senior Subordinated Notes [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	14,867	14,152
Senior Subordinated Notes [Member] | Forgivable Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	0	0
Senior Subordinated Notes [Member] | Mezzanine & Other Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	14,867	14,152
Unsecured Notes [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	29,731	24,030
Unsecured Notes [Member] | Forgivable Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	25,660	20,625
Unsecured Notes [Member] | Mezzanine & Other Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 4,071	$ 3,405