XML 69 R56.htm IDEA: XBRL DOCUMENT v3.22.1
Pension Benefits - Net periodic pension cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Pension Benefits    
Service cost $ 572 $ 492
Interest cost 247 249
Actuarial gain (loss) recognized 47 50
Net periodic pension cost $ 866 $ 791