Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Commitments to Extend Credit
Letters of credit	$ 2,800,000	$ 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	43	40
Standby Letters of Credit
Commitments to Extend Credit
Letters of credit	2,800,000	2,600,000
Commercial Letters of Credit
Commitments to Extend Credit
Letters of credit	$ 31,000	$ 24,000