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FHLB Advances, Other Borrowings and Subordinated Notes - Schedule of FHLB Advances, Other Borrowings and Subordinated Notes (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022
--- | --- | --- | ---
Debt Disclosure [Abstract] |  |  |
FHLB advances | $ 2,326,071 | $ 2,316,071 | $ 2,316,071
Other borrowings: |  |  |
Notes payable | 178,411 | 199,793 | 64,268
Short-term borrowings | 14,183 | 17,612 | 9,212
Secured borrowings | 391,681 | 317,942 | 311,958
Other | 59,724 | 61,267 | 61,777
Total other borrowings | 643,999 | 596,614 | 447,215
Subordinated notes | 437,731 | 437,392 | 437,260
Total FHLB advances, other borrowings and subordinated notes | $ 3,407,801 | $ 3,350,077 | $ 3,200,546

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