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Business Combinations Business Combinations
6 Months Ended
Jun. 30, 2022
Business Combinations [Abstract]  
Business Combination Disclosure BUSINESS COMBINATIONS
2022 Business Combinations
During the six months ended June 30, 2022, NWN Water and its subsidiaries completed one acquisition qualifying as a business combination. The fair value of the preliminary consideration transferred was not material and is not significant to NW Holdings' results of operations.

2021 Business Combinations
During 2021, NWN Water and its subsidiaries completed four acquisitions qualifying as business combinations. The aggregate fair value of the preliminary consideration transferred for these acquisitions were not material and are not significant to NW Holdings' results of operations.
Goodwill
NW Holdings allocates goodwill to reporting units based on the expected benefit from the business combination. We perform an annual impairment assessment of goodwill at the reporting unit level, or more frequently if events and circumstances indicate that goodwill might be impaired. An impairment loss is recognized if the carrying value of a reporting unit’s goodwill exceeds its fair value.

As a result of all acquisitions completed, total goodwill was $70.7 million, $69.3 million, and $70.6 million as of June 30, 2022, June 30, 2021, and December 31, 2021, respectively. All of our goodwill is related to water and wastewater acquisitions and is included in the other category for segment reporting purposes. The annual impairment assessment of goodwill occurs in the fourth quarter of each year. There have been no impairments recognized to date.