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Employee Benefit Plans - Schedule of benefit payments (Details) - Other Postretirement Benefit Plans, Defined Benefit
Dec. 31, 2021
USD ($)
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2022 $ 146,000
2023 156,000
2024 167,000
2025 178,000
2026 188,000
2027 - 2031 $ 1,083,000