Acquisitions	9 Months Ended
Acquisitions	Sep. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Acquisitions	Acquisitions In January 2023, TWC reached an agreement to acquire KT Water Development Ltd. (“KT Water Development”) and SJWTX Holdings, Inc. reached an agreement to acquire KT Water Resources, L.P. (“KT Water Resources”). The agreement between SJWTX Holdings, Inc. and KT Water Resources was assigned to TWR prior to closing. KT Water Development was an investor-owned water utility providing water to approximately 1,725 people through over 570 service connections in the Rockwall Ranch subdivision in southern Comal County, Texas. KT Water Resources was a wholesale groundwater resource supplier to KT Water Development formed to develop wholesale water supplies for the fast-growing utilities of Comal County, Texas. The Public Utility Commission of Texas (“PUCT”) approved the proposed KT Water Development acquisition on July 24, 2023. The acquisition of KT Water Resources did not require PUCT approval. Both transactions closed on August 14, 2023. Further information regarding each of the acquisitions is set forth below. KT Water Development The purchase price of KT Water Development was $7,338, all of which was cash, and was determined in accordance with a fair market value process defined under the Texas Water Code. The transaction was accounted for as a business combination in accordance with Accounting Standards Codification (“ASC”) Topic 805—“Business Combinations.” The transaction consideration was allocated to utility plant. The final purchase price allocation was completed during the quarter ended March 31, 2024, with no change from the preliminary purchase price allocation. Transaction costs were not material. The results of KT Water Development have been included in SJW Group’s consolidated statements of comprehensive income since the acquisition date and were not material. Pro forma financial information has not been presented because the acquisition was not material to SJW Group’s consolidated financial statements. KT Water Resources The total purchase price of KT Water Resources of $39,891 and consisted of a $24,491 up-front cash payment and an obligation for a post-closing production payment with an acquisition date fair value of $15,400. Considering transaction costs of $170, the total cost of the acquisition was $40,061. The KT Water Resources acquisition was accounted for as an asset acquisition in accordance with ASC Topic 805. The total cost was allocated as follows based on the fair values of the assets acquired: $28,386 to other intangible asset, $11,684 to nonutility property, and $9 to other current liabilities. The other intangible asset represents indefinite life water rights. The nonutility property consists of wells, land, easements, and construction work in progress. The post-closing production payment represents an obligation to pay a total amount of $29,000 to the seller over a period up to 29 years. The repayment schedule is based on the quantity of groundwater produced from the acquired wells, subject to certain provisions in the purchase agreement. The fair value of the post-closing payment as of the acquisition date was determined by discounting forecasted repayments based on management’s estimates of future groundwater production. The difference between the fair value of $15,400 and the gross obligation of $29,000 was recorded as a debt discount and is being amortized as interest expense using the effective interest method over the life of the obligation. The post-closing production payment obligation is classified as long-term debt in the condensed consolidated balance sheets.