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Employee Benefit Plans 10 (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
Pension Benefits  
Employee benefit plans  
2022 $ 8,983
2023 9,598
2024 10,347
2025 10,844
2026 11,280
Thereafter 64,368
Total 115,420
Post-Retirement Medical Benefits  
Employee benefit plans  
2022 327
2023 314
2024 292
2025 285
2026 260
Thereafter 869
Total $ 2,347