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Debt
 3 Months Ended
Mar. 31, 2025
Debt [Abstract]  
Debt

4.  Debt

For the three months ended March 31, 2025, the Company did not enter into any new long-term debt arrangements or modify its outstanding long-term debt, which is summarized in the table below.

 
As of
Mar. 31, 2025
    
As of
Dec. 31, 2024
  
             
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       40,000  
5.67% Senior Notes, due 2054
     40,000       40,000  
Committed Line of Credit, due September 2026
    
21,843
      
15,808
  
Total long-term debt
    
214,213
      
208,178
  
Less discount on issuance of long-term debt
    
(133
)
    
(136
)
 Less unamortized debt issuance costs     (2,437 )     (2,481 )
Long-term portion
  
$
211,643
    
$
205,561