Commitments and Contingencies - Schedule of Credit-Related Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Loan commitments
Commitments to Extend Credit
Expire in One Year or Less	$ 4,482,181
Expire After One Year Through Three Years	3,933,575
Expire After Three Years Through Five Years	633,664
Expire After Five Years	118,421
Total	9,167,841	$ 9,141,447
Commercial letters of credit and standby letters of credit (“SBLCs”)
Commitments to Extend Credit
Expire in One Year or Less	1,227,592
Expire After One Year Through Three Years	332,872
Expire After Three Years Through Five Years	258,186
Expire After Five Years	1,086,480
Total	2,905,130	2,610,761
Commitments to Extend Credit
Commitments to Extend Credit
Expire in One Year or Less	5,709,773
Expire After One Year Through Three Years	4,266,447
Expire After Three Years Through Five Years	891,850
Expire After Five Years	1,204,901
Total	$ 12,072,971	$ 11,752,208