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Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss $ 11,220,355 $ 10,884,118
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Total 11,082,405 10,749,347
Non-Covered Loans    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 11,220,818 10,888,345
Loans, before unearned loan fees 11,220,818 10,888,345
Unearned loan fees, net (463) (4,227)
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Total 11,220,355 10,884,118
Non-Covered Loans | Financial Asset, 30-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans, before unearned loan fees 16,835 16,231
Non-Covered Loans | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Loans, before unearned loan fees 51,039 44,445
Non-Covered Loans | Financial Asset, Past Due    
Financing Receivable, Past Due [Line Items]    
Loans, before unearned loan fees 67,874 60,676
Non-Covered Loans | Financial Asset, Not Past Due    
Financing Receivable, Past Due [Line Items]    
Loans, before unearned loan fees 11,152,944 10,827,669
Non-Covered Loans | Commercial and Industrial Portfolio Segment [Member]    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 4,720,428 4,674,056
Non-Covered Loans | Commercial and Industrial Portfolio Segment [Member] | Financial Asset, 30-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,948 3,445
Non-Covered Loans | Commercial and Industrial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 12,228 9,037
Non-Covered Loans | Commercial and Industrial Portfolio Segment [Member] | Financial Asset, Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 14,176 12,482
Non-Covered Loans | Commercial and Industrial Portfolio Segment [Member] | Financial Asset, Not Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 4,706,252 4,661,574
Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member]    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 2,607,755 2,452,402
Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member] | Financial Asset, 30-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 1,377 1,905
Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 14,333 18,395
Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member] | Financial Asset, Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 15,710 20,300
Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member] | Financial Asset, Not Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 2,592,045 2,432,102
Non-Covered Loans | CRE - owner occupied    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 2,359,956 2,344,117
Non-Covered Loans | CRE - owner occupied | Financial Asset, 30-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 10,542 8,409
Non-Covered Loans | CRE - owner occupied | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 18,591 14,142
Non-Covered Loans | CRE - owner occupied | Financial Asset, Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 29,133 22,551
Non-Covered Loans | CRE - owner occupied | Financial Asset, Not Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 2,330,823 2,321,566
Non-Covered Loans | Construction and land development    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 892,563 760,122
Non-Covered Loans | Construction and land development | Financial Asset, 30-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 101 770
Non-Covered Loans | Construction and land development | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 5,620 1,908
Non-Covered Loans | Construction and land development | Financial Asset, Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 5,721 2,678
Non-Covered Loans | Construction and land development | Financial Asset, Not Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 886,842 757,444
Non-Covered Loans | Residential real estate    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 358,923 371,995
Non-Covered Loans | Residential real estate | Financial Asset, 30-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 2,833 1,620
Non-Covered Loans | Residential real estate | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 258 959
Non-Covered Loans | Residential real estate | Financial Asset, Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 3,091 2,579
Non-Covered Loans | Residential real estate | Financial Asset, Not Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 355,832 369,416
Non-Covered Loans | Other    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 281,193 285,653
Non-Covered Loans | Other | Financial Asset, 30-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 34 82
Non-Covered Loans | Other | Financial Asset, Equal to or Greater than 90 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 9 4
Non-Covered Loans | Other | Financial Asset, Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss 43 86
Non-Covered Loans | Other | Financial Asset, Not Past Due    
Financing Receivable, Past Due [Line Items]    
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss $ 281,150 $ 285,567