v3.26.1
INVESTMENT SECURITIES - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value $ 424,390 $ 341,335
Less than 12 Months, Unrealized Losses (4,969) (2,186)
12 Months or More, Fair Value 612,864 615,736
12 Months or More, Unrealized Losses (32,205) (35,310)
Total, Fair Value 1,037,254 957,071
Total, Unrealized Losses (37,174) (37,496)
Asset-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 0 0
Less than 12 Months, Unrealized Losses 0 0
12 Months or More, Fair Value 2,204 1,478
12 Months or More, Unrealized Losses (239) (176)
Total, Fair Value 2,204 1,478
Total, Unrealized Losses (239) (176)
Agency-guaranteed residential mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 224,467 121,782
Less than 12 Months, Unrealized Losses (2,309) (95)
12 Months or More, Fair Value 3,750 3,793
12 Months or More, Unrealized Losses (57) (30)
Total, Fair Value 228,217 125,575
Total, Unrealized Losses (2,366) (125)
Agency-guaranteed residential collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 107,682 171,773
Less than 12 Months, Unrealized Losses (767) (905)
12 Months or More, Fair Value 88,077 92,018
12 Months or More, Unrealized Losses (7,151) (6,490)
Total, Fair Value 195,759 263,791
Total, Unrealized Losses (7,918) (7,395)
Agency-guaranteed commercial collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 20,823 21,190
Less than 12 Months, Unrealized Losses (561) (276)
12 Months or More, Fair Value 73,652 75,013
12 Months or More, Unrealized Losses (3,888) (2,745)
Total, Fair Value 94,475 96,203
Total, Unrealized Losses (4,449) (3,021)
Corporate notes    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 71,418 26,590
Less than 12 Months, Unrealized Losses (1,332) (910)
12 Months or More, Fair Value 86,274 83,414
12 Months or More, Unrealized Losses (9,226) (9,086)
Total, Fair Value 157,692 110,004
Total, Unrealized Losses (10,558) (9,996)
Private label collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 0 0
Less than 12 Months, Unrealized Losses 0 0
12 Months or More, Fair Value 358,907 360,020
12 Months or More, Unrealized Losses (11,644) (16,783)
Total, Fair Value 358,907 360,020
Total, Unrealized Losses $ (11,644) $ (16,783)