Revenue (Tables)

12 Months Ended

Dec. 31, 2020

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):

	2020		2019
Unbilled accounts receivable	$	71,258	$	63,259

Schedule of Utilities Operating Revenue Expense Taxes

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

	2020		2019		2018
Utility-related taxes	$	59,319	$	59,528	$	58,730

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):

	2020			2019			2018
Avista Utilities
Revenue from contracts with customers	$	1,157,746		$	1,152,125		$	1,147,935
Derivative revenues		110,313			118,741			186,459
Alternative revenue programs		(3,814	)		9,614			908
Deferrals and amortizations for rate refunds to customers		5,335			4,509			(18,241	)
Other utility revenues		7,888			10,884			8,905
Total Avista Utilities		1,277,468			1,295,873			1,325,966
AEL&P
Revenue from contracts with customers		42,624			36,779			44,758
Deferrals and amortizations for rate refunds to customers		(190	)		(190	)		(1,753	)
Other utility revenues		375			676			594
Total AEL&P		42,809			37,265			43,599
Other
Revenue from contracts with customers		564			11,286			26,154
Other revenues		1,050			1,198			1,174
Total Other		1,614			12,484			27,328
Total operating revenues	$	1,321,891		$	1,345,622		$	1,396,893

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):

	2020						2019						2018
	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	$	377,785	$	18,618	$	396,403	$	369,102	$	17,134	$	386,236	$	368,753	$	18,506	$	387,259
Commercial and governmental		303,972		23,754		327,726		317,589		19,391		336,980		314,532		25,989		340,521
Industrial		103,103		—		103,103		105,802		—		105,802		109,846		—		109,846
Public street and highway lighting		7,303		252		7,555		7,448		254		7,702		7,539		263		7,802
Total retail revenue		792,163		42,624		834,787		799,941		36,779		836,720		800,670		44,758		845,428
Transmission		18,236		—		18,236		18,180		—		18,180		17,864		—		17,864
Other revenue from contracts    with customers		19,252		—		19,252		26,969		—		26,969		27,364		—		27,364
Total revenue from contracts    with customers	$	829,651	$	42,624	$	872,275	$	845,090	$	36,779	$	881,869	$	845,898	$	44,758	$	890,656

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):

	2020		2019		2018
	Avista Utilities		Avista Utilities		Avista Utilities
NATURAL GAS OPERATIONS
Revenue from contracts with customers
Residential	$	213,612	$	196,430	$	194,340
Commercial		94,937		92,168		89,341
Industrial and interruptible		7,128		5,263		4,753
Total retail revenue		315,677		293,861		288,434
Transportation		7,917		8,674		9,103
Other revenue from contracts with customers		4,501		4,500		4,500
Total revenue from contracts with customers	$	328,095	$	307,035	$	302,037