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Post Retirement Benefits (Tables)
9 Months Ended
Sep. 30, 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
September 30,
Nine months ended
September 30,
2021202020212020
Pension expense:
Multi-employer plan
$179 $157 $600 $549 
Defined contribution plan
263 258 881 766 
Total pension expense442 415 1,481 1,315 
Health and life insurance:
Interest cost
41 58 122 177 
Amortization of prior service credits(124)(124)(372)(372)
Amortization of net loss
43 46 130 135 
Net periodic benefit credit(40)(20)(120)(60)
Total post-retirement benefits expense$402 $395 $1,361 $1,255