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Components of Net Periodic Benefit Cost (Tables)
3 Months Ended
Mar. 31, 2022
Retirement Benefits [Abstract]  
Net Periodic Benefit Cost (Increase) Net periodic (benefit) increase cost for pension benefits and other post-retirement benefits for the three months ended March 31, 2022 and 2021, includes the following components (in thousands):
Three months ended March 31,
Pension benefitsOther post-retirement benefits
2022202120222021
Service cost$— — 
Interest cost214 198 111 106 
Expected return on plan assets(864)(807)— — 
Amortization of prior service cost— — — — 
Amortization of the net loss (gain)— 118 (326)(268)
Net periodic (benefit) cost$(650)(491)(208)(153)