Revenue Revenue (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

Disaggregation of Total Operating Revenue

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

	2018
Avista Utilities
Revenue from contracts with customers	$	354,162
Derivative revenues	58,392
Alternative revenue programs	(5,939		)
Provision for rate refunds (federal income tax law changes)	(19,822		)
Other utility revenues	1,961
Total Avista Utilities	388,754
AEL&P
Revenue from contracts with customers	14,650
Provision for rate refunds (federal income tax law changes)	(1,122		)
Other utility revenues	135
Total AEL&P	13,663
Other
Revenue from contracts with customers	6,729
Other revenues	215
Total other	6,944
Total operating revenues	$	409,361

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 three months ended March 31 (dollars in thousands):

	2018
	Avista Utilities		AEL&P		Total Utility
ELECTRIC OPERATIONS
Revenue from contracts with customers
Residential	$	114,753	$	6,538	$	121,291
Commercial and governmental	78,909		8,044		86,953
Industrial	25,119		—		25,119
Public street and highway lighting	1,859		68		1,927
Total retail revenue	220,640		14,650		235,290
Transmission	3,830		—		3,830
Other revenue from contracts with customers	6,291		—		6,291
Total revenue from contracts with customers	$	230,761	$	14,650	$	245,411

	2018
	Avista Utilities		AEL&P		Total Utility
NATURAL GAS OPERATIONS
Revenue from contracts with customers
Residential	$	80,653	$	—	$	80,653
Commercial	37,373		—		37,373
Industrial and interruptible	1,683		—		1,683
Total retail revenue	119,709		—		119,709
Transportation	2,567		—		2,567
Other revenue from contracts with customers	1,125		—		1,125
Total revenue from contracts with customers	$	123,401	$	—	$	123,401

Unbilled Accounts Receivable [Table Text Block]

Accounts receivable includes unbilled energy revenues of the following amounts as of March 31, 2018 and December 31, 2017 (dollars in thousands):

	March 31,		December 31,
	2018		2017
Unbilled accounts receivable	$	51,835	$	68,641

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 three months ended March 31 (dollars in thousands):

	2018		2017
Utility-related taxes	$	19,167	$	21,584