Revenue (Tables)

12 Months Ended

Dec. 31, 2023

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Unbilled Accounts Receivable

Accounts receivable includes unbilled energy revenues of the following amounts as of December 31 (dollars in thousands):

	2023		2022
Unbilled accounts receivable	$	78,531	$	81,691

Schedule of Utilities Operating Revenue Expense Taxes

Utility-related taxes included in revenue from contracts with customers were as follows for the years ended December 31 (dollars in thousands):

	2023		2022		2021
Utility-related taxes	$	75,404	$	69,931	$	62,736

Disaggregation of Revenue

Disaggregation of Total Operating Revenue

The following table disaggregates total operating revenue by segment and source for the years ended December 31 (dollars in thousands):

	2023		2022			2021
Avista Utilities
Revenue from contracts with customers	$	1,485,510	$	1,400,027		$	1,233,904
Derivative revenues		199,133		286,309			152,590
Alternative revenue programs		4,899		(33,357	)		(6,635	)
Deferrals and amortizations for rate refunds to customers		1,026		207			2,984
Other utility revenues		12,289		10,629			10,156
Total Avista Utilities		1,702,857		1,663,815			1,392,999
AEL&P
Revenue from contracts with customers		47,525		45,703			45,051
Deferrals and amortizations for rate refunds to customers		—		(614	)		(190	)
Other utility revenues		614		615			505
Total AEL&P		48,139		45,704			45,366
Other
Revenue from contracts with customers		—		—			2
Other revenues		558		688			569
Total Other		558		688			571
Total operating revenues	$	1,751,554	$	1,710,207		$	1,438,936

Utility Revenue from Contracts with Customers by Type and Service

The following table disaggregates revenue from contracts with customers associated with the Company's electric operations for the years ended December 31 (dollars in thousands):

	2023						2022						2021
	Avista Utilities		AEL&P		Total Utility		Avista Utilities		AEL&P		Total Utility		Avista Utilities		AEL&P		Total Utility
ELECTRIC OPERATIONS
Revenue from    contracts with    customers
Residential	$	425,258	$	20,232	$	445,490	$	414,823	$	19,667	$	434,490	$	394,717	$	18,940	$	413,657
Commercial and    governmental		343,523		27,026		370,549		338,656		25,782		364,438		326,173		25,861		352,034
Industrial		109,689		—		109,689		107,740		—		107,740		106,756		—		106,756
Public street and    highway lighting		7,976		267		8,243		7,483		254		7,737		7,472		250		7,722
Total retail    revenue		886,446		47,525		933,971		868,702		45,703		914,405		835,118		45,051		880,169
Transmission		32,941		—		32,941		32,307		—		32,307		21,005		—		21,005
Other revenue from    contracts with    customers		45,332		—		45,332		49,920		—		49,920		33,870		—		33,870
Total revenue    from contracts    with customers	$	964,719	$	47,525	$	1,012,244	$	950,929	$	45,703	$	996,632	$	889,993	$	45,051	$	935,044

The following table disaggregates revenue from contracts with customers associated with the Company's natural gas operations for the years ended December 31 (dollars in thousands):

	2023		2022		2021
	Avista Utilities		Avista Utilities		Avista Utilities
NATURAL GAS OPERATIONS
Revenue from contracts with customers
Residential	$	325,631	$	284,452	$	221,405
Commercial		164,048		139,923		100,819
Industrial and interruptible		17,315		10,471		7,796
Total retail revenue		506,994		434,846		330,020
Transportation		8,172		8,627		8,547
Other revenue from contracts with customers		5,625		5,625		5,344
Total revenue from contracts with customers	$	520,791	$	449,098	$	343,911