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MERGERS AND ACQUISITIONS - Narrative (Details) $ / shares in Units, $ in Thousands |  |  | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Aug. 26, 2024 USD ($) state location shares | Apr. 01, 2024 USD ($) $ / shares shares | Dec. 31, 2024 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |  |
Assets |  |  | $ 12,046,722 | $ 12,046,722 | $ 12,283,415
Deposits |  |  | 9,982,490 | 9,982,490 | 10,291,156
Total portfolio loans |  |  | 7,697,087 | 7,697,087 | 7,651,034
Fair value adjustments |  |  | 400 |  |
Goodwill |  |  | 333,695 | 333,695 | 317,873
CrossFirst Bankshares, Inc. |  |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |  |
Number of full-service locations | location | 77 |  |  |  |
Number of states in which entity operates | state | 10 |  |  |  |
Assets | $ 20,000,000 |  |  |  |
Deposits | 17,000,000 |  |  |  |
Total portfolio loans | $ 14,000,000 |  |  |  |
Pre-tax acquisition expenses |  |  |  | 3,900 |
Pre-tax acquisition expenses, legal, professional and consulting fees |  |  |  | 3,100 |
CrossFirst Bankshares, Inc. | Common Stock | CrossFirst Bankshares, Inc. |  |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |  |
Shares received for each share owned (in shares) | shares | 0.6675 |  |  |  |
Merchants and Manufacturers Bank Corporation |  |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |  |
Pre-tax acquisition expenses |  |  |  | 3,000 |
Pre-tax acquisition expenses, legal, professional and consulting fees |  |  |  | 100 |
Per share cash consideration entitled (in dollars per share) | $ / shares |  | $ 117.74 |  |  |
Share consideration conversion ratio |  | 5.7294 |  |  |
Mixed consideration (in dollars per share) | $ / shares |  | $ 34.55 |  |  |
Mixed consideration ratio |  | 4.0481 |  |  |
Business combination consideration, number of shares (in shares) | shares |  | 1,429,304 |  |  |
Cash |  | $ 12,200 |  |  |
Consideration transferred per share in cash, Share Election (in dollars per share) | $ / shares |  | $ 5.3966 |  |  |
Consideration transferred per share in shares, Share Election (in shares) | shares |  | 5.4668 |  |  |
Cash consideration received (in dollars per share) | $ / shares |  | $ 117.74 |  |  |
Fractional shares, payment rate (in dollars per share) | $ / shares |  | $ 23.32 |  |  |
Additional consideration transferred |  | $ 3,000 |  |  |
Number of shares redeemed ( in shares) | shares |  | 300 |  |  |
Goodwill |  | $ 15,822 |  |  |
Wealth Management |  |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |  |
Goodwill |  |  | $ 14,108 | $ 14,108 | $ 14,108
Wealth Management | CrossFirst Bankshares, Inc. |  |  |  |  |
Business Acquisition, Contingent Consideration [Line Items] |  |  |  |  |
Assets | $ 14,000,000 |  |  |  |

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