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Long-Term Debt and Short-Term Borrowings (Tables)
 12 Months Ended
Dec. 31, 2020
Long-Term Debt and Short-Term Borrowings [Abstract]  
Long-Term Debt
Long-term debt as of December 31, 2020 and 2019 is summarized in the following table:

 
2020
  
2019
 
         
10.05% Senior Notes, Series C, due 2020
 
$
–
  
$
6,500
 
8.43% Senior Notes, Series D, due 2022
  
7,500
   
7,500
 
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
   
–
 
Committed Line of Credit, due 2022
  
6,700
   
7,672
 
Total long-term debt
  
126,570
   
104,042
 
Less discount on issuance of long-term debt
  
(181
)
  
(192
)
Less unamortized debt issuance costs
  
(2,816
)
  
(2,815
)
Less current maturities
  
–
   
(6,500
)
Long-term portion
 
$
123,573
  
$
94,535
 
Payments Due by Year
Payments due by year as of December 31, 2020:

2021
 
2022
 
2023
 
2024
 
2025
 
 
$
–
  
$
26,200
  
$
–
  
$
–
  
$
–