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GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Goodwill And Intangible Assets [Line Items] |  |
Goodwill | $ 353,898 | $ 241,949
Gross Carrying Amount | 142,357 | 97,831
Accumulated Amortization | (90,066) | (81,572)
Net Carrying Amount | 52,291 | 16,259
Core deposit intangibles |  |
Goodwill And Intangible Assets [Line Items] |  |
Gross Carrying Amount | 43,578 | 43,578
Accumulated Amortization | (41,456) | (40,310)
Net Carrying Amount | 2,122 | 3,268
Customer relationship intangibles |  |
Goodwill And Intangible Assets [Line Items] |  |
Gross Carrying Amount | 66,394 | 30,014
Accumulated Amortization | (26,947) | (23,053)
Net Carrying Amount | 39,447 | 6,961
Software intangible assets |  |
Goodwill And Intangible Assets [Line Items] |  |
Gross Carrying Amount | 26,952 | 18,612
Accumulated Amortization | (17,942) | (15,168)
Net Carrying Amount | 9,010 | 3,444
Other intangible assets |  |
Goodwill And Intangible Assets [Line Items] |  |
Gross Carrying Amount | 5,433 | 5,627
Accumulated Amortization | (3,721) | (3,041)
Net Carrying Amount | $ 1,712 | $ 2,586

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