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Acquisition of a Business - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 01, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Mar. 31, 2023 | Jun. 30, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Common stock, voting par value |  |  |  |  |  |  | $ 0.01 | $ 0.01 |  |
Goodwill |  |  |  |  |  |  | $ 181,705 | $ 181,705 | $ 148,353 | $ 148,353
Salaries and employee benefits |  |  |  |  |  |  | 140,119 | 126,979 | 118,051 |
Other non-interest expense |  |  |  |  |  |  | $ 10,894 | 10,943 | $ 9,174 |
First Security Bancorp |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquisition advisory expenses |  |  |  | $ 629,000 |  |  |  |  |  |
Inland Bancorp, Inc. |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business acquisition date of agreement |  |  |  |  |  |  | Jul. 01, 2023 |  |  |
Number of shares purchased |  | 2,408,992 | 2,408,992 |  |  |  |  |  |  |
Merger related expenses |  |  |  |  |  |  | $ 0 |  |  |
Business acquisition transaction completion Date |  |  |  |  | Jun. 30, 2023 |  |  |  |  |
Right to receive common stock upon conversion | 0.19 |  |  |  |  |  |  |  |  |
Common stock, voting par value | $ 0.01 |  |  |  |  |  |  |  |  |
Cash payment per share | $ 0.68 |  |  |  |  |  |  |  |  |
Consideration paid in cash | $ 21,200 |  |  |  |  |  | $ 31,897 |  |  |
Common stock issued price per share | $ 18.09 |  |  |  |  |  | $ 18.09 |  |  |
Issuance of common shares | 5,932,323 |  |  |  |  |  | 5,932,323 |  |  |
Value of common stock consideration | $ 107,300 |  |  |  |  |  |  |  |  |
Options to acquire common stock shares | 288,200 |  |  |  |  |  |  |  |  |
Option to acquire common stock value | $ 424,000 |  |  |  |  |  |  |  |  |
Total merger consideration | 138,900 |  |  |  |  | $ 9,900 | $ 138,914 |  |  |
Stock issuance costs | 299,000 |  |  |  |  |  |  |  |  |
Goodwill | $ 33,400 |  |  |  |  |  | $ 33,352 |  |  |
Inland Bancorp, Inc. | Non-interest Expense |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Core system conversion expenses |  |  |  |  |  |  |  | 3,500 |  |
Acquisition advisory expenses |  |  |  |  |  |  |  | 2,500 |  |
Salaries and employee benefits |  |  |  |  |  |  |  | 2,500 |  |
Other non-interest expense |  |  |  |  |  |  |  | $ 688,000 |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479405/805-10-25-23 + Details
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