XML 47 R38.htm IDEA: XBRL DOCUMENT v3.23.1
Pension Plan and Other Postretirement Benefits (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Pension Plan    
Pension Plan and Other Postretirement Benefits    
Employer cash contributions $ 2,900 $ 5,100
Estimated cash contributions in the current fiscal year 2,900  
Components of the pension plans and other postretirement benefits    
Service cost 6,046 9,235
Interest cost 8,746 6,329
Expected return on plan assets (13,421) (11,307)
Amortization of prior service cost 131 242
Recognized net actuarial (gain) loss (637) 999
Net periodic benefit cost (benefit) 865 5,498
Other Benefits    
Pension Plan and Other Postretirement Benefits    
Employer cash contributions 200 100
Estimated cash contributions in the current fiscal year 200  
Components of the pension plans and other postretirement benefits    
Service cost 1,126 1,683
Interest cost 1,297 1,008
Expected return on plan assets (2,636) (2,482)
Amortization of prior service cost 39 39
Recognized net actuarial (gain) loss (581) (228)
Net periodic benefit cost (benefit) $ (755) $ 20