v3.26.1
INVESTMENT SECURITIES - Summary of Held-to-Maturity Debt Securities by Stated Maturity (Detail)
$ in Thousands
Jun. 30, 2026
USD ($)
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost $ 631,594
Fair Value 575,548
Asset-backed securities  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 181,633
Fair Value 178,211
Agency-guaranteed residential mortgage-backed securities  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 6,622
Fair Value 5,864
Agency-guaranteed commercial mortgage-backed securities  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 1,645
Fair Value 1,406
Agency-guaranteed residential collateralized mortgage obligations  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 146,909
Fair Value 133,424
Agency-guaranteed commercial collateralized mortgage obligations  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 190,374
Fair Value 162,131
Private label collateralized mortgage obligations  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 104,411
Fair Value $ 94,512