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GOODWILL AND OTHER INTANGIBLES - Gross Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Finite Lived Intangible Assets [Line Items]      
Net carrying amount $ 19,073   $ 21,118
Core Deposits [Member]      
Finite Lived Intangible Assets [Line Items]      
Gross amount 87,544   87,544
Accumulated amortization (68,557)   (66,644)
Net carrying amount $ 18,987   20,900
Remaining amortization period (in years) 6 years 9 months 18 days 7 years  
Customer Relationships [Member] | Credit Card [Member]      
Finite Lived Intangible Assets [Line Items]      
Gross amount $ 3,800   3,800
Accumulated amortization (3,714)   (3,595)
Net carrying amount $ 86   205
Remaining amortization period (in years) 4 months 24 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