XML 53 R47.htm IDEA: XBRL DOCUMENT v3.24.2.u1
Retirement Plans (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2024
Jun. 30, 2024
Jun. 30, 2023
Retirement Plans [Abstract]          
Service period of participants not impacted by pension plan amendment       15 years  
Age of plan participants not impacted by pension plan amendment       50 years  
Service period of participants who are age fifty not impacted by pension plan amendment       10 years  
Higman [Member]          
Retirement Plans [Abstract]          
Pension contributions       $ 600  
Higman [Member] | Scenario Forecast [Member]          
Retirement Plans [Abstract]          
Pension contributions     $ 1,100    
Pension Plan [Member]          
Components of net periodic benefit cost [Abstract]          
Service cost $ 823 $ 956   1,697 $ 1,848
Interest cost 4,267 4,572   8,590 9,178
Expected return on plan assets (6,224) (5,732)   (12,442) (11,455)
Amortization of actuarial (gain) loss (692) 0   (1,165) 0
Net periodic benefit cost (1,826) (204)   (3,320) (429)
SERP [Member]          
Components of net periodic benefit cost [Abstract]          
Service cost 0 0   0 0
Interest cost 9 10   19 21
Expected return on plan assets 0 0   0 0
Amortization of actuarial (gain) loss 8 6   16 12
Net periodic benefit cost 17 16   35 33
Other Postretirement Benefits Plan [Member]          
Components of net periodic benefit cost [Abstract]          
Interest cost 5 5   10 11
Amortization of actuarial (gain) loss (70) (86)   (140) (172)
Net periodic benefit cost $ (65) $ (81)   $ (130) $ (161)