XML 156 R137.htm IDEA: XBRL DOCUMENT v3.22.1
Post-retirement benefit plans - Schedule of expected future benefit payments (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Retirement Benefits [Abstract]  
2022 $ 1,474
2023 1,554
2024 1,674
2025 1,736
2026 1,917
2027-2031 $ 14,113