XML 60 R41.htm IDEA: XBRL DOCUMENT v3.22.4
Long-Term Debt and Capital Leases (Tables)
 12 Months Ended
Dec. 31, 2022
Long-Term Debt and Lease Obligation [Abstract]  
Schedule of Debt and Capital Leases Long-term debt and finance leases consisted of the following (in thousands):
  December 31,
 Due20222021
Unsecured Debt:   
Unsecured Revolving Line of Credit2027$425,000 $— 
Unsecured Revolving Line of Credit202425,000 — 
Unsecured Revolving Line of Credit2023— 373,000 
Secured Debt:   
Mortgage bonds—   
South Dakota—5.01%202564,000 64,000 
South Dakota—4.15%204230,000 30,000 
South Dakota—4.30%205220,000 20,000 
South Dakota—4.85%204350,000 50,000 
South Dakota—4.22%204430,000 30,000 
South Dakota—4.26%204070,000 70,000 
South Dakota—3.21%203050,000 50,000 
South Dakota—2.80%202660,000 60,000 
South Dakota—2.66%202645,000 45,000 
Montana—5.71%203955,000 55,000 
Montana—5.01%2025161,000 161,000 
Montana—4.15%204260,000 60,000 
Montana—4.30%205240,000 40,000 
Montana—4.85%204315,000 15,000 
Montana—3.99%202835,000 35,000 
Montana—4.176%2044450,000 450,000 
Montana—3.11%202575,000 75,000 
Montana—4.11%2045125,000 125,000 
Montana—4.03%2047250,000 250,000 
Montana—3.98%2049150,000 150,000 
Montana—3.21%2030100,000 100,000 
Montana—1.00%2024100,000 100,000 
Pollution control obligations—   
Montana—2.00%2023144,660 144,660 
Other Long Term Debt:   
Discount on Notes and Bonds and Debt Issuance Costs, Net— (10,778)(11,182)
Total Long-Term Debt $2,618,882 $2,541,478 
Less current maturities (including associated debt issuance costs) (144,525)— 
Total Long-Term Debt, Net of Current Maturities $2,474,357 $2,541,478 
Finance Leases:   
Total Finance LeasesVarious$11,897 $14,772 
Less current maturities (3,098)(2,875)
Total Long-Term Finance Leases $8,799 $11,897