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Goodwill and Other Intangible Assets (Summary of the Gross Carrying Amount and Accumulated Amortization of Intangible Assets) (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Unamortizable intangible assets: |  |
Goodwill | $ 478,750 | $ 478,750
Intangible Assets Excluding Servicing Assets |  |
Amortizable intangible assets: |  |
Gross Carrying Amount | 59,590 | 59,590
Accumulated Amortization | 38,202 | 36,686
Total | 21,388 | 22,904
Customer lists |  |
Amortizable intangible assets: |  |
Gross Carrying Amount | 1,600 | 1,600
Accumulated Amortization | 1,467 | 1,387
Total | 133 | 213
Core deposit intangibles |  |
Amortizable intangible assets: |  |
Gross Carrying Amount | 57,890 | 57,890
Accumulated Amortization | 36,635 | 35,199
Total | 21,255 | 22,691
Other intangibles |  |
Amortizable intangible assets: |  |
Gross Carrying Amount | 100 | 100
Accumulated Amortization | 100 | 100
Total | $ 0 | $ 0

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