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Debt
 6 Months Ended
Jun. 30, 2023
Debt [Abstract]  
Debt

5.  Debt

 
As of
Jun. 30, 2023
    
As of
Dec. 31, 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 September 2024
    
8,127
      
29,740
  
Total long-term debt
    
160,497
      
142,110
  
Less discount on issuance of long-term debt
    
(152
)
    
(158
)
 Less unamortized debt issuance costs     (2,574 )     (2,487 )
Long-term portion
  
$
157,771
    
$
139,465
  

On February 24, 2023, the Company entered into a note purchase agreement with certain institutional investors relating to the private placement of $40,000 aggregate principal amount of the Company’s senior notes.  The senior notes bear interest at 5.50% per annum payable semiannually and mature on February 24, 2053.  The senior notes are unsecured and unsubordinated obligations of the Company.  The Company received net proceeds, after deducting issuance costs, of approximately $39,829.  The net proceeds were used to refinance line of credit borrowings incurred by the Company as interim financing for various capital projects of the Company.