Commitments and Contingencies - Schedule of Credit-Related Commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Commitments to Extend Credit
Commitments to Extend Credit
Expire in One Year or Less	$ 5,708,181
Expire After One Year Through Three Years	4,165,728
Expire After Three Years Through Five Years	1,122,920
Expire After Five Years	1,033,525
Total	12,030,354	$ 12,580,253
Loan commitments
Commitments to Extend Credit
Expire in One Year or Less	4,299,513
Expire After One Year Through Three Years	3,762,755
Expire After Three Years Through Five Years	957,862
Expire After Five Years	144,441
Total	9,164,571	9,623,963
Commercial letters of credit and SBLCs
Commitments to Extend Credit
Expire in One Year or Less	1,408,668
Expire After One Year Through Three Years	402,973
Expire After Three Years Through Five Years	165,058
Expire After Five Years	889,084
Total	$ 2,865,783	$ 2,956,290