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Investment Securities - Debt Securities, Held-to-maturity, Credit Quality Indicator (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | $ 870,294 | $ 840,259
Asset-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 322,877 | 361,107
Agency-guaranteed residential mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 7,152 | 7,189
Agency-guaranteed commercial mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 1,909 | 1,928
Agency-guaranteed residential collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 201,097 | 204,495
Agency-guaranteed commercial collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 150,852 | 151,711
Private label collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 186,407 | $ 113,829
AAA |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 62,327 |
AAA | Asset-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AAA | Agency-guaranteed residential mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AAA | Agency-guaranteed commercial mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AAA | Agency-guaranteed residential collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AAA | Agency-guaranteed commercial collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AAA | Private label collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 62,327 |
AA |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 7,132 |
AA | Asset-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AA | Agency-guaranteed residential mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AA | Agency-guaranteed commercial mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AA | Agency-guaranteed residential collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AA | Agency-guaranteed commercial collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
AA | Private label collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 7,132 |
A |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 34,563 |
A | Asset-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
A | Agency-guaranteed residential mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
A | Agency-guaranteed commercial mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
A | Agency-guaranteed residential collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
A | Agency-guaranteed commercial collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
A | Private label collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 34,563 |
BBB |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 9,256 |
BBB | Asset-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
BBB | Agency-guaranteed residential mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
BBB | Agency-guaranteed commercial mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
BBB | Agency-guaranteed residential collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
BBB | Agency-guaranteed commercial collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 0 |
BBB | Private label collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 9,256 |
Not Rated |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 757,016 |
Not Rated | Asset-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 322,877 |
Not Rated | Agency-guaranteed residential mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 7,152 |
Not Rated | Agency-guaranteed commercial mortgage-backed securities |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 1,909 |
Not Rated | Agency-guaranteed residential collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 201,097 |
Not Rated | Agency-guaranteed commercial collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | 150,852 |
Not Rated | Private label collateralized mortgage obligations |  |
Schedule of Held-to-Maturity Securities [Line Items] |  |
Investment securities held to maturity | $ 73,129 |

X
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