Notes Receivable and Allowance for Losses Schedule Of Notes Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 108,427	$ 94,444
Allowance for losses on non-impaired loans	6,350	5,979
Allowance for losses on receivables specifically evaluated for impairment	1,647	786
Total loan reserves	7,997	6,765
Net carrying value	100,430	87,679
Current portion, net	8,235	5,107
Long-term portion, net	92,195	82,572
Forgivable Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	52,200	44,300
Allowance for losses on non-impaired loans	5,136	4,615
Allowance for losses on receivables specifically evaluated for impairment	0	0
Total loan reserves	5,136	4,615
Net carrying value	47,031	39,718
Current portion, net	214	143
Long-term portion, net	46,817	39,575
Mezzanine & Other Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	56,260	50,111
Allowance for losses on non-impaired loans	1,214	1,364
Allowance for losses on receivables specifically evaluated for impairment	1,647	786
Total loan reserves	2,861	2,150
Net carrying value	53,399	47,961
Current portion, net	8,021	4,964
Long-term portion, net	45,378	42,997
Senior
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	45,047	40,388
Senior | Forgivable Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	0	0
Senior | Mezzanine & Other Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	45,047	40,388
Subordinated
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	6,816	6,197
Subordinated | Forgivable Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	0	0
Subordinated | Mezzanine & Other Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	6,816	6,197
Unsecured
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	56,564	47,859
Unsecured | Forgivable Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	52,167	44,333
Unsecured | Mezzanine & Other Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 4,397	$ 3,526