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Loans and Allowance for Credit Losses - Financing Receivables Past Due (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
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Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 36,136,746 | $ 35,485,776
Commercial real estate - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,594,376 | 4,388,531
Commercial real estate - non-owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,338,098 | 8,130,118
Consumer real estate – mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss |  | 4,914,482
Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,525,860 | 3,699,321
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 14,131,312 | 13,815,817
Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 569,742 | 537,507
Residential Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,977,358 | 4,914,482
30-59 days past due |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 38,796 | 47,769
30-59 days past due | Commercial real estate - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,385 | 7,857
30-59 days past due | Commercial real estate - non-owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 86 | 1,217
30-59 days past due | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 125
30-59 days past due | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 18,099 | 15,992
30-59 days past due | Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,335 | 2,592
30-59 days past due | Residential Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 13,891 | 19,986
60-89 days past due |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 16,467 | 14,362
60-89 days past due | Commercial real estate - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,011 | 2,726
60-89 days past due | Commercial real estate - non-owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 86 | 0
60-89 days past due | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 249 | 0
60-89 days past due | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,220 | 8,515
60-89 days past due | Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,324 | 1,500
60-89 days past due | Residential Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,577 | 1,621
90 days or more past due |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 96,261 | 103,951
90 days or more past due | Commercial real estate - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 13,455 | 10,089
90 days or more past due | Commercial real estate - non-owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 30,669 | 39,469
90 days or more past due | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,747 | 1,541
90 days or more past due | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 33,066 | 31,077
90 days or more past due | Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,417 | 1,160
90 days or more past due | Residential Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 15,907 | 20,615
Financial Asset, Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 151,524 | 166,082
Financial Asset, Past Due | Commercial real estate - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 17,851 | 20,672
Financial Asset, Past Due | Commercial real estate - non-owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 30,841 | 40,686
Financial Asset, Past Due | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,996 | 1,666
Financial Asset, Past Due | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 59,385 | 55,584
Financial Asset, Past Due | Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 7,076 | 5,252
Financial Asset, Past Due | Residential Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 34,375 | 42,222
Financial Asset, Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 35,985,222 | 35,319,694
Financial Asset, Not Past Due | Commercial real estate - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,576,525 | 4,367,859
Financial Asset, Not Past Due | Commercial real estate - non-owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,307,257 | 8,089,432
Financial Asset, Not Past Due | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,523,864 | 3,697,655
Financial Asset, Not Past Due | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 14,071,927 | 13,760,233
Financial Asset, Not Past Due | Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 562,666 | 532,255
Financial Asset, Not Past Due | Residential Mortgage |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 4,942,983 | $ 4,872,260

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