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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2023
Fair Value Measurements [Abstract]  
Fair Value of Assets and Liabilities Carried at Fair Value Measured on Recurring Basis
The following table provides the financial assets and liabilities carried at fair value measured on a recurring basis:

 
Total
Fair Value
    
Level 1
    
Level 2
    
Level 3
  
September 30, 2023
                        
Assets:
                        
Assets held in rabbi trusts
  
$
46,240
    
$
22,250
    
$
23,990
    
$
-
  
Available for sale securities
  
$
3,674
      
3,674
      
-
      
-
  
   
$
49,914
    
$
25,924
    
$
23,990
    
$
-
  
                                 
Liability:
                                
MaxPower acquisition contingent consideration
   $ 6,955     $ -     $
-     $
6,955  
                                 
December 31, 2022
                                
Assets:
                                
Assets held in rabbi trusts
  
$
50,173
    
$
27,168
     $
23,005
    
$
-
  
Available for sale securities
  
$
3,677
      
3,677
      
-
      
-
  
Precious metals
  $
1,252
       1,252       -       -  
   
$
55,102
    
$
32,097
    
$
23,005
    
$
-
  
                                 
Liability:
                               
MaxPower acquisition contingent consideration
  $
6,870     $
-     $
-     $
6,870