v3.26.1
INVESTMENT SECURITIES - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value $ 794,775 $ 341,335
Less than 12 Months, Unrealized Losses (8,542) (2,186)
12 Months or More, Fair Value 551,434 615,736
12 Months or More, Unrealized Losses (28,330) (35,310)
Total, Fair Value 1,346,209 957,071
Total, Unrealized Losses (36,872) (37,496)
Asset-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value   0
Less than 12 Months, Unrealized Losses   0
12 Months or More, Fair Value   1,478
12 Months or More, Unrealized Losses   (176)
Total, Fair Value   1,478
Total, Unrealized Losses   (176)
Agency-guaranteed residential mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 401,772 121,782
Less than 12 Months, Unrealized Losses (5,401) (95)
12 Months or More, Fair Value 0 3,793
12 Months or More, Unrealized Losses 0 (30)
Total, Fair Value 401,772 125,575
Total, Unrealized Losses (5,401) (125)
Agency-guaranteed residential collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 301,286 171,773
Less than 12 Months, Unrealized Losses (1,574) (905)
12 Months or More, Fair Value 84,221 92,018
12 Months or More, Unrealized Losses (7,564) (6,490)
Total, Fair Value 385,507 263,791
Total, Unrealized Losses (9,138) (7,395)
Agency-guaranteed commercial collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 23,085 21,190
Less than 12 Months, Unrealized Losses (449) (276)
12 Months or More, Fair Value 72,551 75,013
12 Months or More, Unrealized Losses (4,555) (2,745)
Total, Fair Value 95,636 96,203
Total, Unrealized Losses (5,004) (3,021)
Corporate notes    
Debt Securities, Available-for-sale [Line Items]    
Less Than 12 Months, Fair Value 68,632 26,590
Less than 12 Months, Unrealized Losses (1,118) (910)
12 Months or More, Fair Value 44,953 83,414
12 Months or More, Unrealized Losses (3,047) (9,086)
Total, Fair Value 113,585 110,004
Total, Unrealized Losses (4,165) (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 349,709 360,020
12 Months or More, Unrealized Losses (13,164) (16,783)
Total, Fair Value 349,709 360,020
Total, Unrealized Losses $ (13,164) $ (16,783)