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Postretirement Benefit Plans - Expected Benefit Payments (Details)
$ in Thousands
Dec. 31, 2024
USD ($)
Defined Benefit Postretirement Health And Life Coverage  
Defined Benefit Plan Disclosure [Line Items]  
2025 $ 30
2026 28
2027 28
2028 25
2029 14
2030-2034 65
Scottdale Defined Benefit Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
2025 139
2026 137
2027 168
2028 196
2029 194
2030-2034 1,038
Riverview Defined Benefit Plan | Pension Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2025 517
2026 506
2027 493
2028 493
2029 485
2030-2034 2,207
Riverview Defined Benefit Plan | Postretirement Life Insurance Benefits  
Defined Benefit Plan Disclosure [Line Items]  
2025 4
2026 3
2027 3
2028 3
2029 3
2030-2034 $ 11