Notes Receivable and Allowance for Losses Schedule Of Notes Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 159,316	$ 125,911
Allowance for losses on non-impaired loans	7,077	5,783
Allowance for losses on receivables specifically evaluated for impairment	1,647	1,647
Total loan reserves	8,724	7,430
Net carrying value	150,592	118,481
Current portion, net	10,789	7,873
Long-term portion, net	139,803	110,608
Forgivable Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	66,698	51,475
Allowance for losses on non-impaired loans	6,307	5,013
Allowance for losses on receivables specifically evaluated for impairment	0	0
Total loan reserves	6,307	5,013
Net carrying value	60,391	46,462
Current portion, net	429	333
Long-term portion, net	59,962	46,129
Mezzanine & Other Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	92,618	74,436
Allowance for losses on non-impaired loans	770	770
Allowance for losses on receivables specifically evaluated for impairment	1,647	1,647
Total loan reserves	2,417	2,417
Net carrying value	90,201	72,019
Current portion, net	10,360	7,540
Long-term portion, net	79,841	64,479
Senior
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	70,616	61,482
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	70,616	61,482
Subordinated
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	18,526	9,336
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	18,526	9,336
Unsecured
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	70,174	55,093
Unsecured \| Forgivable Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	66,698	51,475
Unsecured \| Mezzanine & Other Notes Receivable
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 3,476	$ 3,618

Allowance for Losses on Receivables Specifically Evaluated for Impairment

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Allowance for Losses on Non-impaired Loans

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A valuation allowance for financing receivables that are expected to be uncollectible.

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Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

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