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Financial Instruments - Credit Losses (Tables)
 9 Months Ended
Sep. 30, 2022
Credit Loss [Abstract]  
Schedule of Financing Receivable Credit Quality Indicators
The following table presents the disaggregation of defaulted notes by year of default as of September 30, 2022:
(Expressed in thousands)
As of September 30, 2022
2022$859 
20212,327 
2020542 
2019353 
2018132 
2017 and prior3,449 
Total$7,662 
Schedule of Financing Receivable, Allowance for Credit Loss
The following table presents activity in the allowance for uncollectibles of defaulted notes for the three and nine months ended
September 30, 2022 and 2021:
(Expressed in thousands)
For the Three Months Ended
September 30,		For the Nine Months Ended
September 30
2022202120222021
Beginning balance$5,106 $4,701 $4,923 $4,234 
      Additions and other adjustments97 28 280 495 
Ending balance$5,203 $4,729 $5,203 $4,729