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Employee Benefit Plans (Schedule of Expected Future Benefit Payments) (Details)
Sep. 30, 2020
USD ($)
Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
2021 $ 1,043,787
2022 1,133,470
2023 1,221,341
2024 1,320,157
2025 1,416,485
2026-2030 8,355,472
Postretirement Plan  
Defined Benefit Plan Disclosure [Line Items]  
2021 568,170
2022 605,966
2023 666,049
2024 678,659
2025 684,989
2026-2030 $ 3,637,984