Energy Purchase Contracts (Tables)

12 Months Ended

Dec. 31, 2020

Energy Purchase Contracts [Line Items]

Schedule of Utility Total Expenses

Total expenses for power purchased, natural gas purchased, fuel for generation and other fuel costs, which are included in utility resource costs in the Consolidated Statements of Income, were as follows for the years ended December 31 (dollars in thousands):

	2020		2019		2018
Utility power resources	$	324,297	$	376,769	$	357,656

Future Contractual Commitments for Power Resources and Natural Gas Resources

The following table details Avista Utilities’ future contractual commitments for power resources (including transmission contracts) and natural gas resources (including transportation contracts) (dollars in thousands):

	2021		2022		2023		2024		2025		Thereafter		Total
Power resources	$	181,872	$	177,786	$	173,536	$	157,221	$	157,887	$	849,444	$	1,697,746
Natural gas resources		67,717		52,158		42,499		35,598		32,473		241,145		471,590
Total	$	249,589	$	229,944	$	216,035	$	192,819	$	190,360	$	1,090,589	$	2,169,336

Contractual Obligations [Member]

Energy Purchase Contracts [Line Items]

Future Contractual Commitments for Power Resources and Natural Gas Resources

The following table details future contractual commitments under these agreements (dollars in thousands):

	2021		2022		2023		2024		2025		Thereafter		Total
Contractual obligations	$	33,885	$	31,339	$	32,083	$	35,682	$	33,706	$	208,526	$	375,221