Loans - Summary of Performing and Non Performing Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 79,837	$ 78,789
Loans, before unearned loan fees	10,011,918	9,737,138
Non-Covered Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	10,018,815	9,744,427
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,418,079	2,357,820
Non-Covered Loans | Commercial - investor owned | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	18,417	18,595
Non-Covered Loans | Commercial - investor owned | Special Mention (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	18,417	18,595
Non-Covered Loans | CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,281,223	2,270,551
Non-Covered Loans | CRE - owner occupied | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	29,140	29,397
Non-Covered Loans | CRE - owner occupied | Special Mention (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	29,140	29,397
Non-Covered Loans | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	663,264	611,565
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	79,752	78,647
Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	85	142
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	24,490	23,310
Loans, before unearned loan fees	4,007,699	3,836,572
Commercial and industrial | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	3,810,271	3,645,384
Commercial and industrial | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	145,310	147,206
Commercial and industrial | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	52,118	43,982
Commercial and industrial | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	24,417	23,240
Commercial and industrial | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	73	70
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	736	743
Loans, before unearned loan fees	363,323	394,794
Residential real estate | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	359,442	390,903
Residential real estate | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	1,525	1,543
Residential real estate | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	2,356	2,348
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	736	743
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	7,054	6,744
Loans, before unearned loan fees	246,050	235,039
Other | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	246,036	235,014
Other | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0	0
Other | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	14	25
Other | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	7,042	6,672
Other | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 12	$ 72