Revenue Revenue (Tables)

6 Months Ended

Jun. 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 six months ended June 30 (dollars in thousands):



	Three months ended			Six months ended
	June 30, 2018			June 30, 2018
Avista Utilities
Revenue from contracts with customers	$	239,113		$	593,275
Derivative revenues	56,357			114,749
Alternative revenue programs	3,570			(2,369		)
Deferrals and amortizations for rate refunds to customers	982			(18,840		)
Other utility revenues	2,200			4,161
Total Avista Utilities	302,222			690,976
AEL&P
Revenue from contracts with customers	10,759			25,409
Deferrals and amortizations for rate refunds to customers	(427		)	(1,549		)
Other utility revenues	150			285
Total AEL&P	10,482			24,145
Other
Revenue from contracts with customers	6,324			13,053
Other revenues	270			485
Total other	6,594			13,538
Total operating revenues	$	319,298		$	728,659

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 six months ended June 30 (dollars in thousands):



	Three months ended June 30, 2018						Six months ended June 30, 2018
	Avista Utilities		AEL&P		Total Utility		Avista Utilities		AEL&P		Total Utility
ELECTRIC OPERATIONS
Revenue from contracts with customers
Residential	$	74,818	$	4,155	$	78,973	$	189,571	$	10,693	$	200,264
Commercial and governmental	76,462		6,541		83,003		155,371		14,585		169,956
Industrial	27,985		—		27,985		53,104		—		53,104
Public street and highway lighting	1,899		63		1,962		3,758		131		3,889
Total retail revenue	181,164		10,759		191,923		401,804		25,409		427,213
Transmission	4,171		—		4,171		8,001		—		8,001
Other revenue from contracts with customers	3,919		—		3,919		10,210		—		10,210
Total revenue from contracts with customers	$	189,254	$	10,759	$	200,013	$	420,015	$	25,409	$	445,424



	Three months ended June 30, 2018						Six months ended June 30, 2018
	Avista Utilities		AEL&P		Total Utility		Avista Utilities		AEL&P		Total Utility
NATURAL GAS OPERATIONS
Revenue from contracts with customers
Residential	$	30,767	$	—	$	30,767	$	111,421	$	—	$	111,421
Commercial	14,668		—		14,668		52,040		—		52,040
Industrial and interruptible	1,078		—		1,078		2,761		—		2,761
Total retail revenue	46,513		—		46,513		166,222		—		166,222
Transportation	2,221		—		2,221		4,788		—		4,788
Other revenue from contracts with customers	1,125		—		1,125		2,250		—		2,250
Total revenue from contracts with customers	$	49,859	$	—	$	49,859	$	173,260	$	—	$	173,260

Unbilled Accounts Receivable [Table Text Block]

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



	June 30,		December 31,
	2018		2017
Unbilled accounts receivable	$	39,383	$	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 six months ended June 30 (dollars in thousands):



	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
Utility-related taxes	$	12,986	$	13,552	$	32,153	$	35,136