Property, Plant And Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT

The gross balances of the major classifications of property, plant and equipment are detailed in the following table as of December 31 (dollars in thousands):



	2017		2016
Avista Utilities:
Electric production	$	1,392,017	$	1,346,332
Electric transmission	726,240		682,529
Electric distribution	1,617,451		1,525,175
Electric construction work-in-progress (CWIP) and other	322,144		296,912
Electric total	4,057,852		3,850,948
Natural gas underground storage	46,233		44,672
Natural gas distribution	1,027,197		954,298
Natural gas CWIP and other	63,803		57,601
Natural gas total	1,137,233		1,056,571
Common plant (including CWIP)	588,833		527,458
Total Avista Utilities	5,783,918		5,434,977
AEL&P:
Electric production	97,883		94,839
Electric transmission	21,413		20,252
Electric distribution	21,061		20,057
Electric production held under long-term capital lease	71,007		71,007
Electric CWIP and other	7,341		7,190
Electric total	218,705		213,345
Common plant	8,524		8,651
Total AEL&P	227,229		221,996
Other (1)	36,783		30,764
Total	$	6,047,930	$	5,687,737


(1)	Included in other property and investments-net and other non-current assets on the Consolidated Balance Sheets. Accumulated depreciation was $11.6 million as of December 31, 2017 and $11.2 million as of December 31, 2016 for the other businesses.