Notes Receivable and Allowance for Losses Schedule Of Notes Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 83,045	$ 50,389
Allowance for losses on non-impaired loans	6,022	5,201
Allowance for losses on receivables specifically evaluated for impairment	786	786
Total loan reserves	6,808	5,987
Net carrying value	76,237	44,402
Current portion, net	2,481	3,961
Long-term portion, net	73,756	40,441
Forgivable Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	43,435	32,379
Allowance for losses on non-impaired loans	4,571	3,661
Allowance for losses on receivables specifically evaluated for impairment	0	0
Total loan reserves	4,571	3,661
Net carrying value	38,864	28,718
Current portion, net	148	124
Long-term portion, net	38,716	28,594
Mezzanine & Other Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	39,610	18,010
Allowance for losses on non-impaired loans	1,451	1,540
Allowance for losses on receivables specifically evaluated for impairment	786	786
Total loan reserves	2,237	2,326
Net carrying value	37,373	15,684
Current portion, net	2,333	3,837
Long-term portion, net	35,040	11,847
Senior Notes [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	29,700	10,152
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	29,700	10,152
Senior Subordinated Notes [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	6,215	3,863
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	6,215	3,863
Unsecured Notes [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	47,130	36,374
Unsecured Notes [Member] | Forgivable Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	43,435	32,379
Unsecured Notes [Member] | Mezzanine & Other Notes Receivable [Member]
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 3,695	$ 3,995