Long-Term Debt |
6 Months Ended |
|---|---|
Jun. 30, 2026 | |
| Debt Disclosure [Abstract] | |
| Long-Term Debt | NOTE 10. LONG-TERM DEBT Avista Corp. On May 14, 2026, the Company issued and sold $90.0 million of 4.77 percent first mortgage bonds due in 2029 and $70.0 million of 6.10 percent first mortgage bonds due in 2056 pursuant to a bond purchase agreement with institutional investors in the private placement market. The Company expects to issue and sell an additional $70.0 million of 6.10 percent first mortgage bonds under this bond purchase agreement in August 2026. The net proceeds from the sale of the new bonds were and will be used to refinance existing indebtedness and pay for utility capital expenditures. |