XML 25 R15.htm IDEA: XBRL DOCUMENT v3.23.1
Pension and Other Postretirement Benefits
 3 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits
Components of net periodic benefit cost were as follows: 
 Pension BenefitsPostretirement Benefits
 Three months ended March 31,
(in thousands)2023202220232022
Components of net periodic benefit cost    
Service cost$1,434 $2,007 $119 $160 
Interest cost2,943 2,234 172 84 
Expected return on plan assets(1,962)(1,871)— — 
Amortization of net loss (gain)21 935 (201)(152)
Amortization of prior service cost (credit)46 69 (34)(34)
Net periodic benefit cost$2,482 $3,374 $56 $58 
The non-service cost components of net periodic benefit cost are included in other expense, net in the unaudited condensed consolidated statements of operations.