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INVESTMENT SECURITIES - Gross Unrealized Losses and Fair Value, Aggregated by Investment Category (Detail) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | $ 409,220 | $ 618,574
Less than 12 Months, Unrealized Losses | (3,659) | (11,103)
12 Months or More, Fair Value | 900,154 | 974,040
12 Months or More, Unrealized Losses | (46,367) | (56,938)
Total, Fair Value | 1,309,374 | 1,592,614
Total, Unrealized Losses | (50,026) | (68,041)
Agency-guaranteed residential mortgage-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 191,812 | 266,568
Less than 12 Months, Unrealized Losses | (1,111) | (3,745)
12 Months or More, Fair Value | 0 | 0
12 Months or More, Unrealized Losses | 0 | 0
Total, Fair Value | 191,812 | 266,568
Total, Unrealized Losses | (1,111) | (3,745)
Agency-guaranteed residential collateralized mortgage obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 0 | 126,602
Less than 12 Months, Unrealized Losses | 0 | (2,717)
12 Months or More, Fair Value | 99,860 | 100,144
12 Months or More, Unrealized Losses | (10,080) | (13,395)
Total, Fair Value | 99,860 | 226,746
Total, Unrealized Losses | (10,080) | (16,112)
Agency-guaranteed commercial collateralized mortgage obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 59,818 | 85,902
Less than 12 Months, Unrealized Losses | (1,571) | (2,819)
12 Months or More, Fair Value | 16,881 | 0
12 Months or More, Unrealized Losses | (685) | 0
Total, Fair Value | 76,699 | 85,902
Total, Unrealized Losses | (2,256) | (2,819)
Collateralized loan obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 0 | 35,710
Less than 12 Months, Unrealized Losses | 0 | (265)
12 Months or More, Fair Value | 131,203 | 205,639
12 Months or More, Unrealized Losses | (290) | (1,928)
Total, Fair Value | 131,203 | 241,349
Total, Unrealized Losses | (290) | (2,193)
Commercial mortgage-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 |  | 77,708
12 Months or More, Unrealized Losses |  | (999)
Total, Fair Value |  | 77,708
Total, Unrealized Losses |  | (999)
Corporate notes |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 68,532 | 74,373
Less than 12 Months, Unrealized Losses | (716) | (976)
12 Months or More, Fair Value | 266,678 | 239,509
12 Months or More, Unrealized Losses | (12,087) | (16,064)
Total, Fair Value | 335,210 | 313,882
Total, Unrealized Losses | (12,803) | (17,040)
Private label collateralized mortgage obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less Than 12 Months, Fair Value | 89,058 | 29,419
Less than 12 Months, Unrealized Losses | (261) | (581)
12 Months or More, Fair Value | 385,532 | 351,040
12 Months or More, Unrealized Losses | (23,225) | (24,552)
Total, Fair Value | 474,590 | 380,459
Total, Unrealized Losses | $ (23,486) | $ (25,133)

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