Financing Receivables - Schedule of Financing Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Financing receivables	$ 28,856	$ 16,531
Allowance for doubtful accounts	(5,909)	(6,395)	$ (6,472)	$ (7,086)
Financing receivables, net of allowances	$ 22,947	$ 10,136

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant