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Financial Instruments - Credit Losses (Tables)
 6 Months Ended
Jun. 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 June 30, 2022:
(Expressed in thousands)
As of June 30, 2022
2022$578 
20212,332 
2020568 
2019356 
2018138 
2017 and prior3,452 
Total$7,424 
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 six months ended
June 30, 2022 and 2021:
(Expressed in thousands)
For the Three Months Ended
June 30,		For the Six Months Ended
June 30
2022202120222021
Beginning balance$5,247 $4,766 $4,923 $4,234 
      Additions and other adjustments(141)(65)183 467 
Ending balance$5,106 $4,701 $5,106 $4,701