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GOODWILL AND OTHER INTANGIBLES - Gross Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Finite Lived Intangible Assets [Line Items]    
Net carrying amount $ 17,092 $ 21,118
Core Deposits [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross amount 87,544 87,544
Accumulated amortization (70,469) (66,644)
Net carrying amount $ 17,075 $ 20,900
Remaining amortization period (in years) 6 years 6 months 7 years
Customer Relationships [Member] | Credit Card [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross amount $ 3,800 $ 3,800
Accumulated amortization (3,783) (3,595)
Net carrying amount $ 17 $ 205
Remaining amortization period (in years) 2 months 12 days 8 months 12 days
Insurance Customer Relationship Intangible [Member]    
Finite Lived Intangible Assets [Line Items]    
Gross amount $ 0 $ 1,067
Accumulated amortization 0 (1,054)
Net carrying amount $ 0 $ 13
Remaining amortization period (in years)   1 month 6 days