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Investment Securities - Summary of Amortized Cost and Approximate Fair Value of Investment Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | $ 1,103,170 | $ 840,259
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 1,103,170 | 840,259
Gross Unrealized Gains | 202 | 0
Gross Unrealized Losses | (56,933) | (46,446)
Fair Value | 1,046,439 | 793,813
Asset-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 575,990 | 361,107
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 575,990 | 361,107
Gross Unrealized Gains | 202 | 0
Gross Unrealized Losses | (2,064) | (4,974)
Fair Value | 574,128 | 356,133
Agency-guaranteed residential mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 7,039 | 7,189
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 7,039 | 7,189
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (649) | (563)
Fair Value | 6,390 | 6,626
Agency-guaranteed commercial mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 1,850 | 1,928
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 1,850 | 1,928
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (134) | (104)
Fair Value | 1,716 | 1,824
Agency-guaranteed residential collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 186,636 | 204,495
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 186,636 | 204,495
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (19,049) | (18,376)
Fair Value | 167,587 | 186,119
Agency-guaranteed commercial collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 146,765 | 151,711
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 146,765 | 151,711
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (23,178) | (9,435)
Fair Value | 123,587 | 142,276
Private label collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Amortized Cost | 184,890 | 113,829
Allowance for Credit Losses | 0 | 0
Net Carrying Value | 184,890 | 113,829
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (11,859) | (12,994)
Fair Value | $ 173,031 | $ 100,835

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