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SEGMENT REPORTING & DISCONTINUED OPERATIONS (Information About Reportable Segments and Reconciliation) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Net interest income | $ 138,594 | $ 108,168 | $ 266,141 | $ 211,640
Provision for credit losses | 5,300 | 2,147 | 9,092 | 5,671
Net interest income after provision for credit losses | 133,294 | 106,021 | 257,049 | 205,969
Noninterest income | 30,578 | 40,597 | 55,515 | 60,865
Noninterest expenses | 105,608 | 85,140 | 212,335 | 186,885
Income from continuing operations before income taxes | 58,264 | 61,478 | 100,229 | 79,949
Income tax expense (benefit) | 9,356 | 11,678 | 15,606 | 13,575
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic | (85) | (2,473) | (170) | (2,408)
Discontinued Operations | Mortgage |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net interest income | 0 | 368 | 0 | 642
Provision for credit losses | 0 | (240) | 0 | (264)
Net interest income after provision for credit losses | 0 | 608 | 0 | 906
Noninterest income | 0 | 1,668 | 1 | 3,710
Noninterest expenses | 114 | 5,361 | 230 | 7,624
Income from continuing operations before income taxes | (114) | (3,085) | (229) | (3,008)
Income tax expense (benefit) | (29) | (612) | (59) | (600)
Net Income (Loss) from Discontinued Operations Available to Common Shareholders, Basic | $ (85) | $ (2,473) | $ (170) | $ (2,408)

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