XML 36 R15.htm IDEA: XBRL DOCUMENT
v3.22.4

Property, Plant And Equipment | 12 Months Ended
--- | ---
Dec. 31, 2022
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | (5) PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment at December 31 consisted of the following (dollars in thousands):
|  | 2022 |  | 2021 |  | Lives (in years)
Electric Utilities |  | Property, Plant and Equipment |  |  | Weighted Average Useful Life (in years) |  | Property, Plant and Equipment |  |  | Weighted Average Useful Life (in years) |  | Minimum |  | Maximum
Electric plant: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Production |  | $ | 1,482,081 |  |  | 41 |  | $ | 1,452,055 |  |  | 41 |  | 32 |  | 46
Electric transmission |  |  | 632,872 |  |  | 48 |  |  | 546,126 |  |  | 49 |  | 40 |  | 51
Electric distribution |  |  | 1,082,535 |  |  | 47 |  |  | 1,000,619 |  |  | 47 |  | 45 |  | 50
Integrated Generation |  |  | 713,519 |  |  | 31 |  |  | 720,490 |  |  | 30 |  | 19 |  | 38
Plant acquisition adjustment (a) |  |  | 4,870 |  |  | 32 |  |  | 4,870 |  |  | 32 |  | 32 |  | 32
General |  |  | 274,857 |  |  | 27 |  |  | 266,935 |  |  | 28 |  | 24 |  | 31
Total electric plant in service |  |  | 4,190,734 |  |  |  |  |  | 3,991,095 |  |  |  |  |  |  |
Construction work in progress |  |  | 152,953 |  |  |  |  |  | 181,451 |  |  |  |  |  |  |
Total electric plant |  |  | 4,343,687 |  |  |  |  |  | 4,172,546 |  |  |  |  |  |  |
Less accumulated depreciation and depletion |  |  | (1,104,056 | ) |  |  |  |  | (1,016,738 | ) |  |  |  |  |  |
Electric plant net of accumulated depreciation and depletion |  | $ | 3,239,631 |  |  |  |  | $ | 3,155,808 |  |  |  |  |  |  |
____________________ (a) The plant acquisition adjustment is included in rate base and is being recovered with 8 years remaining.
|  | 2022 |  | 2021 |  | Lives (in years)
Gas Utilities |  | Property, Plant and Equipment |  |  | Weighted Average Useful Life (in years) |  | Property, Plant and Equipment |  |  | Weighted Average Useful Life (in years) |  | Minimum |  | Maximum
Gas plant: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Production |  | $ | 17,843 |  |  | 45 |  | $ | 14,841 |  |  | 40 |  | 24 |  | 47
Gas transmission |  |  | 695,345 |  |  | 58 |  |  | 645,550 |  |  | 58 |  | 32 |  | 72
Gas distribution |  |  | 2,620,174 |  |  | 57 |  |  | 2,394,352 |  |  | 53 |  | 48 |  | 60
Cushion gas - depreciable (a) |  |  | — |  |  | N/A |  |  | 3,539 |  |  | 28 |  | N/A |  | N/A
Cushion gas - not depreciable (a) |  |  | 63,137 |  |  | N/A |  |  | 42,478 |  |  | N/A |  | N/A |  | N/A
Storage |  |  | 65,781 |  |  | 41 |  |  | 56,289 |  |  | 38 |  | 36 |  | 48
General |  |  | 497,407 |  |  | 23 |  |  | 474,964 |  |  | 21 |  | 3 |  | 25
Total gas plant in service |  |  | 3,959,687 |  |  |  |  |  | 3,632,013 |  |  |  |  |  |  |
Construction work in progress |  |  | 52,041 |  |  |  |  |  | 37,860 |  |  |  |  |  |  |
Total gas plant |  |  | 4,011,728 |  |  |  |  |  | 3,669,873 |  |  |  |  |  |  |
Less accumulated depreciation |  |  | (471,013 | ) |  |  |  |  | (389,115 | ) |  |  |  |  |  |
Gas plant net of accumulated depreciation |  | $ | 3,540,715 |  |  |  |  | $ | 3,280,758 |  |  |  |  |  |  |
____________________ (a) Depreciation of Cushion Gas is determined by the respective regulatory jurisdiction in which the Cushion Gas resides. In 2022, assets classified as Cushion gas - depreciable were fully depreciated and removed from gross plant in service and accumulated depreciation.
|  | 2022 |  | 2021 |  | Lives (in years)
Corporate |  | Property, Plant and Equipment |  |  | Weighted Average Useful Life (in years) |  | Property, Plant and Equipment |  |  | Weighted Average Useful Life (in years) |  | Minimum |  | Maximum
Total plant in service |  | $ | 5,685 |  |  | 11 |  | $ | 5,694 |  |  | 10 |  | 4 |  | 24
Construction work in progress |  |  | 13,690 |  |  |  |  |  | 8,460 |  |  |  |  |  |  |
Total gross property, plant and equipment |  |  | 19,375 |  |  |  |  |  | 14,154 |  |  |  |  |  |  |
Less accumulated depreciation |  |  | (1,773 | ) |  |  |  |  | (1,544 | ) |  |  |  |  |  |
Total net of accumulated depreciation |  | $ | 17,602 |  |  |  |  | $ | 12,610 |  |  |  |  |  |  |

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 The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI https://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI https://asc.fasb.org/extlink&oid=126982197&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126982197&loc=d3e99779-112916 + Details
Name: | us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration