Segment Reporting - Schedule of Financing Receivables by Segment (Details) $ in Thousands	Jun. 30, 2025 USD ($) employee	Dec. 31, 2024 USD ($) employee
Segment Reporting Information [Line Items]
Loans, net of deferred fees and costs	$ 43,536,716	$ 42,609,028
Deposits	$ 49,925,007	$ 51,095,359
Full-time equivalent employees \| employee	4,804	4,696
Operating Segments \| Wholesale Banking
Segment Reporting Information [Line Items]
Loans, net of deferred fees and costs	$ 25,406,506	$ 24,677,119
Deposits	$ 14,552,198	$ 15,207,166
Full-time equivalent employees \| employee	351	336
Operating Segments \| Community Banking
Segment Reporting Information [Line Items]
Loans, net of deferred fees and costs	$ 8,033,796	$ 7,921,182
Deposits	$ 10,717,809	$ 10,877,394
Full-time equivalent employees \| employee	558	533
Operating Segments \| Consumer Banking
Segment Reporting Information [Line Items]
Loans, net of deferred fees and costs	$ 2,673,928	$ 2,776,305
Deposits	$ 17,835,182	$ 18,365,142
Full-time equivalent employees \| employee	1,486	1,475
Operating Segments \| Financial Management Services
Segment Reporting Information [Line Items]
Loans, net of deferred fees and costs	$ 5,220,638	$ 5,263,474
Deposits	$ 1,221,253	$ 1,109,270
Full-time equivalent employees \| employee	555	565
Treasury and Corporate Other
Segment Reporting Information [Line Items]
Loans, net of deferred fees and costs	$ 2,201,848	$ 1,970,948
Deposits	$ 5,598,565	$ 5,536,387
Full-time equivalent employees \| employee	1,854	1,787