XML 56 R45.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Property, Plant And Equipment (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Property, Plant and Equipment [Abstract] |
Public Utility Property, Plant, and Equipment [Table Text Block] | For utility operations, the ratio of depreciation provisions to average depreciable property was as follows for the years ended December 31:
| 2019 |  | 2018 |  | 2017
Avista Utilities |  |  |  |  |
Ratio of depreciation to average depreciable property | 3.28 | % |  | 3.17 | % |  | 3.12 | %
Alaska Electric Light and Power Company |  |  |  |  |
Ratio of depreciation to average depreciable property | 2.48 | % |  | 2.46 | % |  | 2.43 | %
The average service lives for the following broad categories of utility plant in service are (in years):
| Avista Utilities |  | Alaska Electric Light and Power Company
Electric thermal/other production | 35 |  | 40
Hydroelectric production | 81 |  | 44
Electric transmission | 50 |  | 41
Electric distribution | 38 |  | 39
Natural gas distribution property | 45 |  | N/A
Other shorter-lived general plant | 9 |  | 14
Net Utility Property Net utility property consisted of the following as of December 31 (dollars in thousands):
| 2019 |  | 2018
Utility plant in service | $ | 6,462,993 |  |  | $ | 6,209,968 |
Construction work in progress | 164,941 |  |  | 160,598 |
Total | 6,627,934 |  |  | 6,370,566 |
Less: Accumulated depreciation and amortization | 1,830,927 |  |  | 1,721,636 |
Total net utility property | $ | 4,797,007 |  |  | $ | 4,648,930 |
Gross 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):
| 2019 |  | 2018
Avista Utilities: |  |  |
Electric production | $ | 1,445,017 |  |  | $ | 1,426,961 |
Electric transmission | 802,546 |  |  | 761,156 |
Electric distribution | 1,847,273 |  |  | 1,726,410 |
Electric construction work-in-progress (CWIP) and other | 350,331 |  |  | 341,041 |
Electric total | 4,445,167 |  |  | 4,255,568 |
Natural gas underground storage | 51,017 |  |  | 48,549 |
Natural gas distribution | 1,203,186 |  |  | 1,118,720 |
Natural gas CWIP and other | 81,245 |  |  | 76,488 |
Natural gas total | 1,335,448 |  |  | 1,243,757 |
Common plant (including CWIP) | 681,711 |  |  | 641,465 |
Total Avista Utilities | 6,462,326 |  |  | 6,140,790 |
AEL&P: |  |  |
Electric production | 100,448 |  |  | 99,803 |
Electric transmission | 22,000 |  |  | 21,347 |
Electric distribution | 24,096 |  |  | 22,374 |
Electric production held under long-term capital lease (1) | — |  |  | 71,007 |
Electric CWIP and other | 9,539 |  |  | 7,072 |
Electric total | 156,083 |  |  | 221,603 |
Common plant | 9,525 |  |  | 8,173 |
Total AEL&P | 165,608 |  |  | 229,776 |
Total gross utility property | 6,627,934 |  |  | 6,370,566 |
Other (2) | 28,195 |  |  | 39,145 |
Total | $ | 6,656,129 |  |  | $ | 6,409,711 |
(1) | At December 31, 2018, the finance lease ROU assets were included in "Net utility property" on the Consolidated Balance Sheet. Due to the adoption of ASC 842 on January 1, 2019, the Company has reclassified these amounts to "Other property and investments-net and other non-current assets" on the Consolidated Balance Sheet such that their presentation as of December 31, 2019 is consistent with operating leases.
(2) Included in other property and investments-net and other non-current assets on the Consolidated Balance Sheets. Accumulated depreciation was $5.4 million as of December 31, 2019 and $12.4 million as of December 31, 2018 for the other businesses.

X
- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of public utility physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, deprecation expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84167750&loc=d3e42232-110370 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_ScheduleOfPublicUtilityPropertyPlantAndEquipmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration