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Long-Term Debt and Short-Term Borrowings (Tables)
 12 Months Ended
Dec. 31, 2023
Long-Term Debt and Short-Term Borrowings [Abstract]  
Long-Term Debt
Long-term debt as of December 31, 2023 and 2022 is summarized in the following table:

 
2023
    
2022
  
             
Variable Rate Pennsylvania Economic Development Financing Authority
Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029
   $
12,000
     $
12,000
  
3.00% Pennsylvania Economic Development Financing Authority Exempt
Facilities Revenue Refunding Bonds, Series A of 2019, due 2036
    
10,500
      
10,500
  
3.10% Pennsylvania Economic Development Financing Authority Exempt
Facilities Revenue Refunding Bonds, Series B of 2019, due 2038
    
14,870
      
14,870
  
3.23% Senior Notes, due 2040
    
15,000
      
15,000
  
4.00% - 4.50% York County Industrial Development Authority Exempt
Facilities Revenue Bonds, Series 2015, due 2029 - 2045
    
10,000
      
10,000
  
4.54% Senior Notes, due 2049
    
20,000
      
20,000
  
3.24% Senior Notes, due 2050
    
30,000
      
30,000
  
5.50% Senior Notes, due 2053
    40,000
       –
  
Committed Line of Credit, due 2025
    
30,273
      
29,740
  
Total long-term debt
    
182,643
      
142,110
  
Less discount on issuance of long-term debt
    
(147
)
    
(158
)
Less unamortized debt issuance costs
    
(2,489
)
    
(2,487
)
Long-term portion
  
$
180,007
    
$
139,465
  
Payments Due by Year
Payments due by year as of December 31, 2023:

2024
  
2025
  
2026
  
2027
  
2028
$–
  
$42,273
  
$330
  
$340
  
$355