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Loans and Leases - Summary of Loans and Leases by Segment (Detail) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | $ 56,597,110 | $ 52,505,168
Commercial portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | 45,230,196 | 42,068,001
Commercial portfolio | Funds held in escrow |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | 20,405,237 | 18,037,942
Commercial portfolio | Accounts receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | 1,231,231 | 1,404,007
Commercial portfolio | Prepaid expenses |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | 15,326,007 | 14,492,436
Commercial portfolio | Total other assets |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | 7,008,839 | 6,898,600
Commercial portfolio | Equipment financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | 1,258,882 | 1,235,016
Consumer portfolio |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | 11,366,914 | 10,437,167
Consumer portfolio | Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | 9,599,577 | 8,853,669
Consumer portfolio | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | 1,370,513 | 1,427,692
Consumer portfolio | Other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans and Leases | $ 396,824 | $ 155,806

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