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SEGMENT INFORMATION - Reconciliation of the Reportable Segment Financial Information (Details) - Segment Reconciling Items [Member] - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Average assets: |  |  |  |
Total average earning assets for segments | $ 18,274,980 | $ 18,029,894 | $ 18,293,054 | $ 18,026,527
Average non earning assets | 766,226 | 854,537 | 780,918 | 844,838
Total consolidated average assets | $ 19,041,206 | $ 18,884,431 | $ 19,073,972 | $ 18,871,365

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