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Business Combination (Tables) | 9 Months Ended
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Sep. 30, 2020
Business Combinations [Abstract] |
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] | The following table summarizes the purchase price and recording of fair values of assets acquired and liabilities assumed as of the acquisition date and subsequent adjustments as of September 30, 2020.
| Amounts Previously Recognized as of Acquisition Date (a) |  | Measurement Period Adjustments |  | Amounts Recognized as of Acquisition Date (as Adjusted)
Assets acquired: |  |  |  |  |
Utility plant, net | $ | 750,703 |  |  | $ | — |  |  | $ | 750,703 |
Nonutility plant | 848 |  |  | — |  |  | 848 |
Current assets | 42,673 |  |  | (1,167 | ) |  | 41,506 |
Investments | 12,489 |  |  | — |  |  | 12,489 |
Regulatory assets and deferred charges, less current portion | 83,132 |  |  | (4,307 | ) |  | 78,825 |
Other intangible assets | 17,181 |  |  | — |  |  | 17,181 |
Other assets | 2,592 |  |  | — |  |  | 2,592 |
Goodwill | 626,523 |  |  | (1,222 | ) |  | 625,301 |
Total assets acquired | 1,536,141 |  |  | (6,696 | ) |  | 1,529,445 |
Liabilities assumed: |  |  |  |  |
Long-term debt | 281,009 |  |  | — |  |  | 281,009 |
Current liabilities, including maturities of long-term debt | 125,772 |  |  | 25 |  |  | 125,797 |
Deferred income taxes | 107,789 |  |  | (7,145 | ) |  | 100,644 |
Postretirement benefit plans | 31,789 |  |  | — |  |  | 31,789 |
Contributions in aid of construction and construction advances | 137,327 |  |  | — |  |  | 137,327 |
Other long-term liabilities | 10,607 |  |  | 424 |  |  | 11,031 |
Total liabilities assumed | 694,293 |  |  | (6,696 | ) |  | 687,597 |
Assumed equity | $ | 841,848 |  |  | $ | — |  |  | $ | 841,848 |

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- Definition Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + Details
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