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Goodwill and Other Intangibles | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangibles | 6. Goodwill and Other Intangibles Changes in the carrying amount of goodwill for the periods ended September 30, 2025 and December 31, 2024 by reportable segment are as follows (in thousands):
|  | Commercial Banking |  |  | Institutional Banking |  |  | Personal Banking |  |  | Total |
Balances as of January 1, 2025 |  | $ | 63,113 |  |  | $ | 76,492 |  |  | $ | 67,780 |  |  | $ | 207,385 |
Acquisition of HTLF |  |  | 976,748 |  |  |  | — |  |  |  | 651,165 |  |  |  | 1,627,913 |
Balances as of September 30, 2025 |  | $ | 1,039,861 |  |  | $ | 76,492 |  |  | $ | 718,945 |  |  | $ | 1,835,298 |
Balances as of January 1, 2024 |  | $ | 63,113 |  |  | $ | 76,492 |  |  | $ | 67,780 |  |  | $ | 207,385 |
Balances as of December 31, 2024 |  | $ | 63,113 |  |  | $ | 76,492 |  |  | $ | 67,780 |  |  | $ | 207,385 |
The following table lists the finite-lived intangible assets that continue to be subject to amortization as of September 30, 2025 and December 31, 2024 (in thousands):
|  | As of September 30, 2025 |
|  | Core Deposit Intangible Assets |  |  | Customer Relationships |  |  | Total |
Gross carrying amount |  | $ | 481,294 |  |  | $ | 123,212 |  |  | $ | 604,506 |
Accumulated amortization |  |  | 59,391 |  |  |  | 33,665 |  |  |  | 93,056 |
Net carrying amount |  | $ | 421,903 |  |  | $ | 89,547 |  |  | $ | 511,450 |
|  | As of December 31, 2024 |
|  | Core Deposit Intangible Assets |  |  | Customer Relationships |  |  | Total |
Gross carrying amount |  | $ | 2,345 |  |  | $ | 86,800 |  |  | $ | 89,145 |
Accumulated amortization |  |  | 1,600 |  |  |  | 23,898 |  |  |  | 25,498 |
Net carrying amount |  | $ | 745 |  |  | $ | 62,902 |  |  | $ | 63,647 |
Related to the acquisition of HTLF, the Company recognized $1.6 billion of goodwill, a $474.1 million core deposit intangible asset, wealth customer list of $26.0 million, and purchased credit card relationships of $10.9 million. See Note 13, “Acquisition” for additional information. On September 2, 2025, the Company acquired a healthcare savings account business, which included $32.5 million of deposits. The purchase resulted in recognition of a $4.8 million core deposit intangible asset. The following table has the aggregate amortization expense recognized in each period (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Aggregate amortization expense |  | $ | 25,317 |  |  | $ | 1,917 |  |  | $ | 68,067 |  |  | $ | 5,788 |
The following table discloses the estimated amortization expense of intangible assets in future periods (in thousands):
For the three months ending December 31, 2025 |  | $ | 25,433 |
For the year ending December 31, 2026 |  |  | 92,995 |
For the year ending December 31, 2027 |  |  | 82,404 |
For the year ending December 31, 2028 |  |  | 70,336 |
For the year ending December 31, 2029 |  |  | 61,390 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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