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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Commitments to Extend Credit |  |
Letters of credit | $ 2,700,000 | $ 2,600,000
Allowance for unfunded credit commitments | 39,000 | 38,000
Loans Sold or Securitized With Recourse | Single Family and Multi-family Residential Loans | Loans Sold or Securitized with Recourse |  |
Commitments to Extend Credit |  |
Allowance for unfunded credit commitments | 40 | 40
Standby Letters of Credit |  |
Commitments to Extend Credit |  |
Letters of credit | 2,700,000 | 2,600,000
Commercial Letters of Credit |  |
Commitments to Extend Credit |  |
Letters of credit | $ 26,000 | $ 24,000

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