Notes Receivable and Allowance for Losses - Schedule Of Notes Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 122,909	$ 124,884
Allowance for losses on receivables specifically evaluated for impairment	4,426	4,426
Allowance for losses on non-impaired loans	259	259
Total loan reserves	4,685	4,685
Net carrying value	118,224	120,199
Current portion, net	34,416	36,759
Long-term portion, net	83,808	83,440
Senior
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	91,115	94,349
Subordinated
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	29,270	28,100
Unsecured
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 2,524	$ 2,435

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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For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay.

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Amounts due from parties associated with the reporting entity as evidenced by a written promise to pay, due within 1 year (or 1 business cycle).

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