XML 102 R79.htm IDEA: XBRL DOCUMENT v3.22.4
LONG-TERM DEBT: Long-term Debt Level 4 (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Total first mortgage bonds $ 1,848,000 $ 1,800,000
Pollution control revenue bonds Variable Rate Series 2000 due 2027 0 4,360
Total pollution control revenue bonds 166,100 170,460
American Falls bond guarantee 19,885 19,885
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net 10,160 10,295
Total outstanding debt [1] 2,194,145 2,000,640
Current maturities of long-term debt 0 0
Long-Term Debt 2,194,145 2,000,640
Idaho Power Company    
Debt Instrument [Line Items]    
Total outstanding debt $ 2,194,145 $ 2,000,640
Effective cost of outstanding debt 4.60% 4.40%
First Mortgage Bonds 2.50 Series due 2023    
Debt Instrument [Line Items]    
First mortgage bonds $ 75,000 $ 75,000
Debt Instrument, Interest Rate, Stated Percentage 2.50% 2.50%
First Mortgage Bonds 2.50 Series due 2023 | Idaho Power Company    
Debt Instrument [Line Items]    
First mortgage bonds $ 75,000  
First mortgage bonds 6.00 Series due 2032    
Debt Instrument [Line Items]    
First mortgage bonds $ 100,000 $ 100,000
Debt Instrument, Interest Rate, Stated Percentage 6.00% 6.00%
First Mortgage Bonds 4.99 Series Due 2032    
Debt Instrument [Line Items]    
First mortgage bonds $ 23,000 $ 0
Debt Instrument, Interest Rate, Stated Percentage 4.99% 4.99%
First Mortgage Bonds 4.99 Series Due 2032 | Idaho Power Company    
Debt Instrument [Line Items]    
First mortgage bonds $ 23,000  
First mortgage bonds 5.50 Series due 2033    
Debt Instrument [Line Items]    
First mortgage bonds $ 70,000 $ 70,000
Debt Instrument, Interest Rate, Stated Percentage 5.50% 5.50%
First mortgage bonds 5.50 Series due 2034    
Debt Instrument [Line Items]    
First mortgage bonds $ 50,000 $ 50,000
Debt Instrument, Interest Rate, Stated Percentage 5.50% 5.50%
First mortgage bonds 5.875 Series due 2034    
Debt Instrument [Line Items]    
First mortgage bonds $ 55,000 $ 55,000
Debt Instrument, Interest Rate, Stated Percentage 5.875% 5.875%
First mortgage bonds 5.30 Series due 2035    
Debt Instrument [Line Items]    
First mortgage bonds $ 60,000 $ 60,000
Debt Instrument, Interest Rate, Stated Percentage 5.30% 5.30%
First mortgage bonds 6.30 Series due 2037    
Debt Instrument [Line Items]    
First mortgage bonds $ 140,000 $ 140,000
Debt Instrument, Interest Rate, Stated Percentage 6.30% 6.30%
First mortgage bonds 6.25 Series due 2037    
Debt Instrument [Line Items]    
First mortgage bonds $ 100,000 $ 100,000
Debt Instrument, Interest Rate, Stated Percentage 6.25% 6.25%
First mortgage bonds 4.85 Series due 2040    
Debt Instrument [Line Items]    
First mortgage bonds $ 100,000 $ 100,000
Debt Instrument, Interest Rate, Stated Percentage 4.85% 4.85%
First Mortgage Bonds 4.30 Series Due 2042    
Debt Instrument [Line Items]    
First mortgage bonds $ 75,000 $ 75,000
Debt Instrument, Interest Rate, Stated Percentage 4.30% 4.30%
First Mortgage Bonds 5.06 Series Due 2042    
Debt Instrument [Line Items]    
First mortgage bonds $ 25,000 $ 0
Debt Instrument, Interest Rate, Stated Percentage 5.06% 5.06%
First Mortgage Bonds 5.06 Series Due 2042 | Idaho Power Company    
Debt Instrument [Line Items]    
First mortgage bonds $ 25,000  
First Mortgage Bonds 4.00 Series due 2043    
Debt Instrument [Line Items]    
First mortgage bonds $ 75,000 $ 75,000
Debt Instrument, Interest Rate, Stated Percentage 4.00% 4.00%
First mortgage bonds 3.65% Series due 2045    
Debt Instrument [Line Items]    
First mortgage bonds $ 250,000 $ 250,000
Debt Instrument, Interest Rate, Stated Percentage 3.65% 3.65%
First mortgage bonds 4.05 Series due 2046    
Debt Instrument [Line Items]    
First mortgage bonds $ 120,000 $ 120,000
Debt Instrument, Interest Rate, Stated Percentage 4.05% 4.05%
First Mortgage Bonds 4.20 K Series due 2048    
Debt Instrument [Line Items]    
First mortgage bonds $ 450,000 $ 450,000
Debt Instrument, Interest Rate, Stated Percentage 4.20% 4.20%
Pollution Control Bonds 1.45 due 2024    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.45% 1.45%
Pollution control revenue bonds 5.15 Series due 2024 [2] $ 49,800 $ 49,800
Floating Rate Term Loan Facility Due 2024    
Debt Instrument [Line Items]    
Floating Rate Term Loan Facility due 2024 $ 150,000 $ 0
Pollution Control Bond 1.70 due 2026    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.70% 1.70%
Pollution control revenue bonds 5.25 Series due 2026 [2] $ 116,300 $ 116,300
Secured debt including Humboldt County and Sweetwater County pollution control revenue bonds    
Debt Instrument [Line Items]    
Total first mortgage bonds 2,014,000  
First Mortgage Bonds 1.90 Series L Due July 15 2030    
Debt Instrument [Line Items]    
First mortgage bonds $ 80,000 $ 80,000
Debt Instrument, Interest Rate, Stated Percentage 1.90% 1.90%
[1] At December 31, 2022 and 2021, the overall effective cost rate of Idaho Power's outstanding debt was 4.60 percent and 4.40 percent, respectively.
[2] Humboldt County and Sweetwater County Pollution Control Revenue Bonds are secured by the first mortgage bonds, bringing the total first mortgage bonds outstanding at December 31, 2022, to $2.014 billion