v3.26.1
INVESTMENT SECURITIES - Summary of Held-to-Maturity Debt Securities by Stated Maturity (Detail)
$ in Thousands
Mar. 31, 2026
USD ($)
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost $ 663,545
Fair Value 608,462
Asset-backed securities  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 217,790
Fair Value 215,504
Agency-guaranteed residential mortgage-backed securities  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 6,665
Fair Value 5,911
Agency-guaranteed commercial mortgage-backed securities  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 1,666
Fair Value 1,426
Agency-guaranteed residential collateralized mortgage obligations  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 150,633
Fair Value 135,873
Agency-guaranteed commercial collateralized mortgage obligations  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 181,395
Fair Value 155,272
Private label collateralized mortgage obligations  
Schedule of Held-to-Maturity Securities [Line Items]  
Amortized Cost 105,396
Fair Value $ 94,476