Financial Instruments - Credit Losses - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021		Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Notes receivable, net	$ 59,099		$ 53,983	[1]
Uncollectible balance reserved (as a percent)	100.00%
Uncollectible balance period (in years)	5 years
Uncollected balance of defaulted notes	$ 7,424
Allowance for credit loss	5,106	$ 5,247	$ 4,923		$ 4,701	$ 4,766	$ 4,234
Notes Receivable, Five Years and Older
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for credit loss	3,400
Notes Receivable, Under Five Years
Financing Receivable, Credit Quality Indicator [Line Items]
Allowance for credit loss	$ 1,700
Minimum | Notes Receivable
Financing Receivable, Credit Quality Indicator [Line Items]
Service period (in years)	3 years
Maximum | Notes Receivable
Financing Receivable, Credit Quality Indicator [Line Items]
Service period (in years)	10 years

[1] Certain prior period reported amounts were reclassified to conform to the current period presentation, see Note 2