Revenue Revenue (Tables)

9 Months Ended

Sep. 30, 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 and nine months ended September 30 (dollars in thousands):

	Three months ended			Nine months ended
	September 30, 2018			September 30, 2018
Avista Utilities
Revenue from contracts with customers	$	242,098		$	835,373
Derivative revenues	32,718			147,467
Alternative revenue programs	606			(1,763		)
Deferrals and amortizations for rate refunds to customers	1,940			(16,900		)
Other utility revenues	2,187			6,348
Total Avista Utilities	279,549			970,525
AEL&P
Revenue from contracts with customers	9,599			35,008
Deferrals and amortizations for rate refunds to customers	(156		)	(1,705		)
Other utility revenues	127			412
Total AEL&P	9,570			33,715
Other
Revenue from contracts with customers	6,580			19,633
Other revenues	314			799
Total other	6,894			20,432
Total operating revenues	$	296,013		$	1,024,672

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 and nine months ended September 30 (dollars in thousands):

	Three months ended September 30, 2018						Nine months ended September 30, 2018
	Avista Utilities		AEL&P		Total Utility		Avista Utilities		AEL&P		Total Utility
ELECTRIC OPERATIONS
Revenue from contracts with customers
Residential	$	82,470	$	2,987	$	85,457	$	272,041	$	13,680	$	285,721
Commercial and governmental	80,744		6,546		87,290		236,115		21,131		257,246
Industrial	30,806		—		30,806		83,910		—		83,910
Public street and highway lighting	1,860		66		1,926		5,618		197		5,815
Total retail revenue	195,880		9,599		205,479		597,684		35,008		632,692
Transmission	4,832		—		4,832		12,833		—		12,833
Other revenue from contracts with customers	8,564		—		8,564		18,774		—		18,774
Total revenue from contracts with customers	$	209,276	$	9,599	$	218,875	$	629,291	$	35,008	$	664,299

	Three months ended September 30, 2018						Nine months ended September 30, 2018
	Avista Utilities		AEL&P		Total Utility		Avista Utilities		AEL&P		Total Utility
NATURAL GAS OPERATIONS
Revenue from contracts with customers
Residential	$	19,247	$	—	$	19,247	$	130,668	$	—	$	130,668
Commercial	9,437		—		9,437		61,477		—		61,477
Industrial and interruptible	1,006		—		1,006		3,767		—		3,767
Total retail revenue	29,690		—		29,690		195,912		—		195,912
Transportation	2,007		—		2,007		6,795		—		6,795
Other revenue from contracts with customers	1,125		—		1,125		3,375		—		3,375
Total revenue from contracts with customers	$	32,822	$	—	$	32,822	$	206,082	$	—	$	206,082

Unbilled Accounts Receivable [Table Text Block]

Accounts receivable includes unbilled energy revenues of the following amounts as of September 30, 2018 and December 31, 2017 (dollars in thousands):

	September 30,		December 31,
	2018		2017
Unbilled accounts receivable	$	38,991	$	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 and nine months ended September 30 (dollars in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Utility-related taxes	$	12,294	$	12,663	$	44,447	$	47,799