Revenue Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Schedule Of Utilities Operating Revenue Expense Taxes [Table Text Block]

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

	2018		2017		2016
Utility-related taxes	$	58,730	$	64,012	$	57,745

Unbilled Accounts Receivable [Table Text Block]

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

	2018		2017
Unbilled accounts receivable	$	67,098	$	68,641

Disaggregation of Revenue [Table Text Block]

Disaggregation of Total Operating Revenue

The following table disaggregates total operating revenue by segment and source for the year ended December 31, 2018 (dollars in thousands):

	2018
Avista Utilities
Revenue from contracts with customers	$	1,147,935
Derivative revenues	186,459
Alternative revenue programs	908
Deferrals and amortizations for rate refunds to customers	(18,241		)
Other utility revenues	8,905
Total Avista Utilities	1,325,966
AEL&P
Revenue from contracts with customers	44,758
Deferrals and amortizations for rate refunds to customers	(1,753		)
Other utility revenues	594
Total AEL&P	43,599
Other
Revenue from contracts with customers	26,154
Other revenues	1,174
Total other	27,328
Total operating revenues	$	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 utility operations for the year ended December 31, 2018 (dollars in thousands):

	2018
	Avista Utilities		AEL&P		Total Utility
ELECTRIC OPERATIONS
Revenue from contracts with customers
Residential	$	368,753	$	18,506	$	387,259
Commercial and governmental	314,532		25,989		340,521
Industrial	109,846		—		109,846
Public street and highway lighting	7,539		263		7,802
Total retail revenue	800,670		44,758		845,428
Transmission	17,864		—		17,864
Other revenue from contracts with customers	27,364		—		27,364
Total revenue from contracts with customers	$	845,898	$	44,758	$	890,656

	2018
	Avista Utilities		AEL&P		Total Utility
NATURAL GAS OPERATIONS
Revenue from contracts with customers
Residential	$	194,340	$	—	$	194,340
Commercial	89,341		—		89,341
Industrial and interruptible	4,753		—		4,753
Total retail revenue	288,434		—		288,434
Transportation	9,103		—		9,103
Other revenue from contracts with customers	4,500		—		4,500
Total revenue from contracts with customers	$	302,037	$	—	$	302,037