Commitments and Contingencies - Credit-Related Commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Loan commitments
Commitments to Extend Credit
Expire in One Year or Less	$ 4,583,179
Expire After One Year Through Three Years	3,734,399
Expire After Three Years Through Five Years	993,345
Expire After Five Years	125,704
Total	9,436,627	$ 8,211,571
Commercial letters of credit and SBLCs
Commitments to Extend Credit
Expire in One Year or Less	717,105
Expire After One Year Through Three Years	513,359
Expire After Three Years Through Five Years	90,696
Expire After Five Years	1,094,248
Total	2,415,408	2,291,966
Commitments to Extend Credit
Commitments to Extend Credit
Expire in One Year or Less	5,300,284
Expire After One Year Through Three Years	4,247,758
Expire After Three Years Through Five Years	1,084,041
Expire After Five Years	1,219,952
Total	$ 11,852,035	$ 10,503,537