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Business Combinations and Asset Acquisitions | 3 Months Ended
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Mar. 31, 2024
Business Combination and Asset Acquisition [Abstract] |
Business Combination Disclosure | Business Combination On February 28, 2023, the Company completed the Merger and UHC merged with and into Columbia, with Columbia continuing as the surviving legal corporation. Promptly following the Merger, Columbia’s wholly-owned bank subsidiary, Columbia State Bank, merged with and into UHC’s wholly-owned bank subsidiary, Umpqua Bank, with Umpqua Bank surviving the merger. Refer to Note 1 - Summary of Significant Accounting Policies under the Basis of Financial Statement Presentation for more information pertaining to the completed Merger. The Merger was accounted for as a reverse merger using the acquisition method of accounting; therefore, UHC was deemed the acquirer for financial reporting purposes, even though Columbia was the legal acquirer. The Merger was effectively an all-stock transaction and has been accounted for as a business combination. As of December 31, 2023, the Company finalized its valuation of all assets acquired and liabilities assumed in connection with the Merger. The Company recorded approximately $1.0 billion of goodwill and $710.2 million of other intangible assets. Goodwill represents the excess of the purchase price over the fair value of the assets acquired, net of fair value of liabilities assumed. Goodwill is not deductible for tax purposes. During the three months ended March 31, 2024 there were $4.5 million in merger-related expenses, compared to $115.9 million during the three months ended March 31, 2023. Additional merger-related expenses will be expensed in future periods as incurred. The following table presents unaudited pro forma information as if the Merger had occurred on January 1, 2022, which was the beginning of the last full fiscal year completed prior to the date of the Merger. The pro forma adjustments give effect to any change in interest income due to the accretion of the discount (premium) associated with the fair value adjustments to acquired loans and leases, any change in interest expense due to estimated premium amortization/discount accretion associated with the fair value adjustment to acquired interest-bearing deposits and long-term debt and the amortization of the core deposit intangible that would have resulted had the deposits been acquired as of January 1, 2022. The pro forma information is not indicative of what would have occurred had the Merger occurred as of the beginning of the year prior to the Merger Date. The pro forma amounts below do not reflect the Company's expectations as of the date of the pro forma information of further operating cost savings and other business synergies expected to be achieved, including revenue growth as a result of the Merger. As a result, actual amounts differed from the unaudited pro forma information presented.
| Unaudited Pro Forma for the
| Three Months Ended
(in thousands) | March 31, 2023 |  |
Net interest income | $ | 526,260 |  |  |
Non-interest income | $ | 88,572 |  |  |
Net income (1) | $ | 217,135 |  |  |
(1) The 2023 pro forma net income was adjusted to exclude $143.9 million of merger-related costs, inclusive of historical Columbia merger-related costs, incurred in 2023, as these costs were included in the 2022 pro forma net income.

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- Definition The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479907/805-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 805 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//805/tableOfContent + Details
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