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SEGMENT REPORTING AND REVENUE (Operating Segment Results) (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 USD ($) segment | Jun. 30, 2022 segment | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |  |
Number of operating segments | segment | 2 | 1 |  |  |
Net interest income |  |  | $ 584,261 | $ 551,260 | $ 555,298
Provision for credit losses |  |  | 19,028 | (60,888) | 87,141
Net interest income after provision for credit losses |  |  | 565,233 | 612,148 | 468,157
Noninterest income |  |  | 118,523 | 125,806 | 131,486
Noninterest expenses |  |  | 403,802 | 419,195 | 413,349
Income before income taxes |  |  | 279,954 | 318,759 | $ 186,294
LHFI, net of deferred fees and costs | $ 14,449,142 |  | 14,449,142 | 13,195,843 |
Goodwill | 925,211 |  | 925,211 | 935,560 |
Deposits | 15,931,677 |  | 15,931,677 | 16,611,068 |
Wholesale Banking |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Net interest income |  |  | 296,040 | 297,950 |
Provision for credit losses |  |  | 11,517 | (34,225) |
Net interest income after provision for credit losses |  |  | 284,523 | 332,175 |
Noninterest income |  |  | 24,094 | 14,002 |
Noninterest expenses |  |  | 143,065 | 130,220 |
Income before income taxes |  |  | 165,552 | 215,957 |
LHFI, net of deferred fees and costs | 11,339,660 |  | 11,339,660 | 10,242,918 |
Goodwill | 629,630 |  | 629,630 | 629,630 |
Deposits | 5,870,061 |  | 5,870,061 | 6,114,078 |
Consumer Banking |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Net interest income |  |  | 228,550 | 225,630 |
Provision for credit losses |  |  | 7,472 | (26,663) |
Net interest income after provision for credit losses |  |  | 221,078 | 252,293 |
Noninterest income |  |  | 69,362 | 85,008 |
Noninterest expenses |  |  | 238,117 | 237,590 |
Income before income taxes |  |  | 52,323 | 99,711 |
LHFI, net of deferred fees and costs | 3,126,615 |  | 3,126,615 | 2,976,200 |
Goodwill | 295,581 |  | 295,581 | 305,930 |
Deposits | 9,983,266 |  | 9,983,266 | 10,366,792 |
Corporate Other |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Net interest income |  |  | 59,671 | 27,680 |
Provision for credit losses |  |  | 39 |  |
Net interest income after provision for credit losses |  |  | 59,632 | 27,680 |
Noninterest income |  |  | 25,067 | 26,796 |
Noninterest expenses |  |  | 22,620 | 51,385 |
Income before income taxes |  |  | 62,079 | 3,091 |
LHFI, net of deferred fees and costs | (17,133) |  | (17,133) | (23,275) |
Goodwill | 0 |  | 0 | 0 |
Deposits | $ 78,350 |  | $ 78,350 | $ 130,198 |

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