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Loans - Summary of Performing and Non Performing Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 35,695	$ 8,056
Non-Covered Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	7,241,500	7,241,074
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	1,646,021	1,589,419
Non-Covered Loans | Commercial - investor owned | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		3,309
Non-Covered Loans | Commercial - investor owned | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		0
Non-Covered Loans | Commercial - investor owned | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		3,309
Non-Covered Loans | CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	1,554,727	1,498,408
Non-Covered Loans | CRE - owner occupied | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		24,367
Non-Covered Loans | CRE - owner occupied | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		0
Non-Covered Loans | CRE - owner occupied | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		24,367
Non-Covered Loans | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	556,776	546,686
Non-Covered Loans | Construction and land development | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		2,407
Non-Covered Loans | Construction and land development | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees		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
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	35,682	8,035
Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	13	21
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	3,373	2,502
Loans, before unearned loan fees	2,927,432	3,086,494
Commercial and industrial | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,715,710	2,876,755
Commercial and industrial | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	169,626	157,556
Commercial and industrial | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	42,096	52,183
Commercial and industrial | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	3,370	2,502
Commercial and industrial | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	3	0
Residential Portfolio Segment
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	907	921
Loans, before unearned loan fees	304,590	318,258
Residential Portfolio Segment | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	294,707	307,996
Residential Portfolio Segment | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,461	4,491
Residential Portfolio Segment | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	5,422	5,771
Residential Portfolio Segment | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	907	921
Residential Portfolio Segment | 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	1,332	4,633
Loans, before unearned loan fees	231,109	177,614
Other | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	228,377	174,888
Other | Watch (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,679	2,647
Other | Classified (8 & 9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	53	79
Other | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	1,322	4,612
Other | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 10	$ 21

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