Allowance for Doubtful Accounts - Age Analysis of Past-Due Note Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Total
Financing Receivable, Past Due [Line Items]
Notes Receivable	$ 14,945	$ 14,467
0-90 Days
Financing Receivable, Past Due [Line Items]
Notes Receivable	953	1,254
91 - 180 Days
Financing Receivable, Past Due [Line Items]
Notes Receivable	5,676	4,124
Greater than 181 Days
Financing Receivable, Past Due [Line Items]
Notes Receivable	8,316	9,089
Standard notes receivable
Financing Receivable, Past Due [Line Items]
Notes Receivable	65,407	66,418
Standard notes receivable | Total
Financing Receivable, Past Due [Line Items]
Notes Receivable	13,165	8,507
Standard notes receivable | 0-90 Days
Financing Receivable, Past Due [Line Items]
Notes Receivable	953	1,001
Standard notes receivable | 91 - 180 Days
Financing Receivable, Past Due [Line Items]
Notes Receivable	5,676	3,794
Standard notes receivable | Greater than 181 Days
Financing Receivable, Past Due [Line Items]
Notes Receivable	6,536	3,712
Elevated risk notes receivable
Financing Receivable, Past Due [Line Items]
Notes Receivable	1,780	5,960
Elevated risk notes receivable | Total
Financing Receivable, Past Due [Line Items]
Notes Receivable	1,780	5,960
Elevated risk notes receivable | 0-90 Days
Financing Receivable, Past Due [Line Items]
Notes Receivable	0	253
Elevated risk notes receivable | 91 - 180 Days
Financing Receivable, Past Due [Line Items]
Notes Receivable	0	330
Elevated risk notes receivable | Greater than 181 Days
Financing Receivable, Past Due [Line Items]
Notes Receivable	$ 1,780	$ 5,377