XML 74 R61.htm IDEA: XBRL DOCUMENT v3.26.1
Pension and Other Postretirement Benefits - Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Pension Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost $ 104 $ 108 $ 207 $ 210
Interest cost 2,313 2,379 4,560 4,663
Expected return on plan assets (2,156) (2,076) (4,320) (4,059)
Actuarial loss (gain) amortization 169 150 338 290
Prior service cost amortization 7 7 13 12
Net periodic benefit cost (income) 437 568 798 1,116
Other Postretirement Benefits        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost 0 0 0 0
Interest cost 13 14 25 28
Expected return on plan assets 0 0 0 0
Actuarial loss (gain) amortization (20) (26) (39) (52)
Prior service cost amortization 0 0 0 0
Net periodic benefit cost (income) $ (7) $ (12) $ (14) $ (24)