XML 78 R59.htm IDEA: XBRL DOCUMENT v3.25.0.1
Employee Benefit Plans, Changes in Benefit Obligation and Plan Assets (Details) - Defined Benefit Pension Plans Combined [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Employee Benefit Plans [Abstract]    
Maximum period of eligible service 30 years  
Change in Benefit Obligation [Abstract]    
Pension benefit obligation at beginning of year $ 40,198 $ 38,717
Service cost 635 598
Interest cost 1,855 1,876
Actuarial (gain) loss (2,997) 974
Benefit payments (2,135) (1,967)
Pension benefit obligation at end of year 37,556 40,198
Change in Plan Assets [Abstract]    
Fair value of plan assets at beginning of year 63,578 55,807
Actual return on plan assets 1,011 8,058
Employer contributions 111 1,680
Benefits paid (2,135) (1,967)
Fair value of plan assets at end of year 62,565 63,578
Funded status of plans at end of year $ 25,009 $ 23,380
Change in discount rate 0.70% (0.25%)
Threshold for amortization of gains and losses 10.00%  
Changes in Plan Assets and Benefit Obligations Recognized in Regulatory Assets [Abstract]    
Net gain arising during the year $ (844) $ (3,472)
Recognized prior service credit 13 13
Total changes in regulatory liability during the year (831) (3,459)
Amounts Recognized in Regulatory Liabilities that Have Not Yet Been Recognized as Components of Net Periodic Benefit Cost [Abstract]    
Net loss (1,370) (526)
Prior service credit (11) (24)
Regulatory liability $ (1,381) $ (550)