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Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Fair Value of Financial Assets and Liabilities |  |
Risk premium (as a percent) | 1.83% |
Advances for construction | $ 194,046 | $ 191,062
Cost |  |
Fair Value of Financial Assets and Liabilities |  |
Long-term debt, including current maturities, net | 808,331 | 808,622
Advances for construction | 194,046 | 191,062
Total | 1,002,377 | 999,684
Total |  |
Fair Value of Financial Assets and Liabilities |  |
Long-term debt, including current maturities, net | 989,749 | 873,454
Advances for construction | 82,078 | 79,550
Total | 1,071,827 | 953,004
Total | Level 1 |  |
Fair Value of Financial Assets and Liabilities |  |
Long-term debt, including current maturities, net | 0 | 0
Advances for construction | 0 | 0
Total | 0 | 0
Total | Level 2 |  |
Fair Value of Financial Assets and Liabilities |  |
Long-term debt, including current maturities, net | 989,749 | 873,454
Advances for construction | 82,078 | 79,550
Total | 1,071,827 | 953,004
Total | Level 3 |  |
Fair Value of Financial Assets and Liabilities |  |
Long-term debt, including current maturities, net | 0 | 0
Advances for construction | 0 | 0
Total | $ 0 | $ 0

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