v3.26.1
INVESTMENTS (Narrative) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Trading securities $ 4,383 $ 5,747
AFS debt securities, allowance 0 0
Net unrealized loss on debt securities, net of tax 35,700 33,700
Deferred tax assets, unrealized losses on available for sale securities 10,200 9,600
HTM debt securities, excluding accrued interest from amortized cost 1,500 1,600
Asset Pledged as Collateral    
Schedule of Investments [Line Items]    
AFS and HTM debt securities, amortized cost 947,800 952,700
AFS and HTM debt securities, fair value 896,400 904,300
Available-for-sale Securities    
Schedule of Investments [Line Items]    
Interest receivable 2,500 2,600
Transferred Securities    
Schedule of Investments [Line Items]    
Net unrealized loss on debt securities, net of tax (35,400) (36,700)
Deferred tax assets, unrealized losses on available for sale securities $ 10,300 $ 10,600