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Financing: Revolving Credit Facility and CP Program (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021
Net borrowings (payments) of Revolving Credit Facility and CP Program | $ 81,170 | $ 98,485
Commercial Paper |  |
Short-term interest rate | 3.35% |

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