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Financial Instruments - Credit Losses - Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]            
Notes receivable, net $ 61,270   $ 57,495      
Uncollectible balance reserved (as a percent) 100.00%          
Uncollectible balance period (in years) 5 years          
Uncollected balance of defaulted notes $ 6,576          
Allowance for credit loss 3,948 $ 3,814 $ 4,327 $ 5,203 $ 5,106 $ 4,923
Notes Receivable, Five Years and Older            
Financing Receivable, Credit Quality Indicator [Line Items]            
Allowance for credit loss 2,100          
Notes Receivable, Under Five Years            
Financing Receivable, Credit Quality Indicator [Line Items]            
Allowance for credit loss $ 1,800          
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