Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Commitments to Extend Credit
Letters of credit	$ 2,600,000	$ 2,300,000
Allowance for unfunded credit commitments	38,000	26,000
Standby Letters of Credit
Commitments to Extend Credit
Letters of credit	2,600,000	2,300,000
Commercial Letters Of Credit
Commitments to Extend Credit
Letters of credit	24,000	22,000
Loans sold or securitized with recourse | Single Family Residential and Multi-Family Residential | Loans Sold or Securitized with Recourse
Commitments to Extend Credit
Allowance for unfunded credit commitments	$ 40	$ 37