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SEGMENT REPORTING & DISCONTINUED OPERATIONS (Information About Reportable Segments and Reconciliation) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Net interest income | $ 555,298 | $ 537,872 | $ 426,691
Provision for credit losses | 87,141 | 21,092 | 13,736
Net interest income after provision for credit losses | 468,157 | 516,780 | 412,955
Noninterest income | 131,486 | 132,815 | 104,241
Noninterest expenses | 413,349 | 418,340 | 337,767
Income before income taxes | 0 | (230) | (4,280)
Income tax expense (benefit) | 0 | (60) | (1,115)
Loss on discontinued operations | $ 0 | (170) | (3,165)
Mortgage | Discontinued Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Net interest income |  |  | 850
Provision for credit losses |  |  | (185)
Net interest income after provision for credit losses |  |  | 1,035
Noninterest income |  | 1 | 3,882
Noninterest expenses |  | 231 | 9,197
Income before income taxes |  | (230) | (4,280)
Income tax expense (benefit) |  | (60) | (1,115)
Loss on discontinued operations |  | $ (170) | $ (3,165)

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