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GOODWILL, CORE DEPOSIT PREMIUM AND OTHER INTANGIBLE ASSETS (Goodwill narrative) (Details) - USD ($)
3 Months Ended
Sep. 30, 2021
Jun. 30, 2022
Dec. 31, 2021
Goodwill [Line Items]      
Goodwill   $ 576,005,000 $ 576,005,000
Goodwill impairment $ 0