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INVESTMENTS (Narrative) (Detail) - USD ($)
$ in Thousands
 1 Months Ended
Jun. 30, 2022
Sep. 30, 2022
Dec. 31, 2021
Schedule of Investments [Line Items]      
Trading securities   $ 3,727 $ 4,428
AFS debt securities, allowance   0 0
Net unrealized loss on debt securities, net of tax   86,600 1,200
Deferred tax assets, unrealized losses on available for sale securities   23,700 321
HTM debt securities, allowance   0 0
HTM debt securities, excluding accrued interest from amortized cost   1,400 10
Asset Pledged as Collateral      
Schedule of Investments [Line Items]      
AFS and HTM debt securities, amortized cost   765,800 640,100
AFS and HTM debt securities, fair value   673,600 641,200
Available-for-sale Securities      
Schedule of Investments [Line Items]      
Interest Receivable   2,000 $ 3,400
Transferred Securities      
Schedule of Investments [Line Items]      
AFS debt securities transferred to HTM, fair value $ 520,300    
AFS debt securities, transfer, unrealized loss $ 72,100    
Net unrealized loss on debt securities, net of tax   (53,700)  
Deferred tax assets, unrealized losses on available for sale securities   $ 14,700