Commitments and Contingencies - Schedule of Credit-Related Commitments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Loan commitments
Commitments to Extend Credit
Expire in One Year or Less	$ 4,699,796
Expire After One Year Through Three Years	3,405,090
Expire After Three Years Through Five Years	855,790
Expire After Five Years	219,462
Total	9,180,138	$ 9,623,963
Commercial letters of credit and SBLCs
Commitments to Extend Credit
Expire in One Year or Less	1,339,368
Expire After One Year Through Three Years	566,099
Expire After Three Years Through Five Years	152,788
Expire After Five Years	934,073
Total	2,992,328	2,956,290
Commitments to Extend Credit
Commitments to Extend Credit
Expire in One Year or Less	6,039,164
Expire After One Year Through Three Years	3,971,189
Expire After Three Years Through Five Years	1,008,578
Expire After Five Years	1,153,535
Total	$ 12,172,466	$ 12,580,253