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Post Retirement Benefits (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Pension, health and life insurance expense:        
Multi-employer plan $ 85,000 $ 199,000 $ 333,000 $ 624,000
Defined contribution plan 425,000 459,000 1,302,000 1,397,000
Total pension expense 510,000 658,000 1,635,000 2,021,000
Interest cost 29,000 23,000 89,000 69,000
Amortization of prior service credits (124,000) (124,000) (372,000) (372,000)
Amortization of net gain (22,000) (37,000) (61,000) (111,000)
Net periodic benefit credit (117,000) (138,000) (344,000) (414,000)
Total post-retirement benefits expense 393,000 $ 520,000 1,291,000 $ 1,607,000
Pension Plan        
Pension, health and life insurance expense:        
Payments made to pension plans     1,607,000  
Pension plan payments expected to be made in fiscal year 365,000   365,000  
Pension plan payments accrued 123,000   123,000  
Other Postretirement Benefits Plan        
Pension, health and life insurance expense:        
Payments for post retirement healthcare and life insurance     98,000  
Pension plan payments expected to be made in fiscal year 36,000   36,000  
Pension plan payments accrued $ 36,000   $ 36,000