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Post Retirement Benefits (Tables)
3 Months Ended
Mar. 31, 2021
Retirement Benefits [Abstract]  
Schedule of Post Retirement Benefit Plans
The components of expense for the Company’s post-retirement benefit plans are as follows (in thousands):
Three months ended
March 31,
20212020
Pension expense:
Multi-employer plan
$189 $246 
Defined contribution plan
302 293 
Total pension expense491 539 
Health and life insurance:
Interest cost
41 59 
Amortization of prior service costs
(124)(124)
Amortization of net loss
43 45 
Net periodic benefit cost(40)(20)
Total post retirement benefits expense$451 $519