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Benefit Plans And Obligations For Termination Indemnity (Narrative) (Details)
 1 Months Ended 12 Months Ended
Dec. 31, 2025
USD ($)
subsidiary
Dec. 31, 2025
USD ($)
subsidiary
plan
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Jul. 31, 2025
USD ($)
Retirement Benefits [Abstract]          
Defined Benefit Plan, Number Of Plans | plan   5      
Defined Benefit Plan, Number of Subsidiaries | subsidiary 2 2      
Assets for plan benefits, defined benefit plan         $ 30,256,000
Non-operating settlement benefit $ 10,200,000        
Eligibility age for normal retirement benefit plan, in years   65 years      
Lump sum based on employee contribution percentage to certain breakpoint   2.00%      
Additional percentage exceeding the breakpoint   6.00%      
Maximum percentage of pensionable salary   5.00%      
Maximum employer contributions, in years   40 years      
Expected benefit payments, 2014 80,000 $ 80,000      
Expected benefit payments, 2015 78,000 78,000      
Expected benefit payments, 2016 87,000 87,000      
Expected benefit payments, 2017 84,000 84,000      
Expected benefit payments, 2018 82,000 82,000      
Total expense   $ 18,008,000 $ 18,582,000 $ 16,961,000  
Salary and bonus defer percentage under the plan   100.00%      
Amount on the dollar ESA matches up to 10% of employees total salary   $ 0.00005      
ESA offers, maximum percentage   10.00%      
Participant contributions transferred into the plan   $ 2,353,000 $ 1,558,000 $ 2,418,000  
ESA contribution to the plan   235,000      
Cash surrender value of the life insurance policies 8,175,000 8,175,000      
Non-qualified defined contribution plan liabilitiy 22,443,000 22,443,000      
Plan assets of life insurance policies, cash surrender $ 4,796,000 4,796,000      
Related liability, pension payments   $ 10,946,000