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Loans - Summary of Performing and Non Performing Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 59,861	$ 55,995
Loans, before unearned loan fees	9,354,987	9,017,642
Non-Covered Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	9,361,916	9,026,780
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,286,458	2,141,143
Non-Covered Loans | Commercial - investor owned | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	13,947	1
Non-Covered Loans | Commercial - investor owned | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0	0
Non-Covered Loans | Commercial - investor owned | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	13,947	1
Non-Covered Loans | CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,152,189	2,035,785
Non-Covered Loans | CRE - owner occupied | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	21,962	23,405
Non-Covered Loans | CRE - owner occupied | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0	0
Non-Covered Loans | CRE - owner occupied | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	21,962	23,405
Non-Covered Loans | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	583,649	734,073
Non-Covered Loans | Construction and land development | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,407	2,690
Non-Covered Loans | Construction and land development | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0	0
Non-Covered Loans | Construction and land development | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,407	2,690
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	59,846	55,982
Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	15	13
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	20,251	26,167
Loans, before unearned loan fees	3,689,642	3,366,208
Commercial and industrial | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	3,471,251	3,174,029
Commercial and industrial | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	173,621	152,619
Commercial and industrial | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	44,770	39,560
Commercial and industrial | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	20,250	26,166
Commercial and industrial | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	1	1
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	397	267
Loans, before unearned loan fees	397,053	453,785
Residential real estate | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	393,138	444,774
Residential real estate | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	1,627	5,838
Residential real estate | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,288	3,173
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	397	267
Residential real estate | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	0	0
Other
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	897	3,465
Loans, before unearned loan fees	224,451	256,749
Other | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	224,425	254,266
Other | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2	2,445
Other | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	24	38
Other | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	883	3,453
Other | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 14	$ 12

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