Loans - Summary of Performing and Non Performing Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 88,228	$ 78,789
Loans, before unearned loan fees	10,512,623	9,737,138
Non-Covered Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	10,512,623	9,737,138
Loans, before unearned loan fees	10,518,809	9,744,427
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	2,465,654	2,357,820
Loans, before unearned loan fees	2,465,654	2,357,820
Non-Covered Loans | Commercial - investor owned | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	18,240	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	18,240	18,595
Non-Covered Loans | CRE - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	2,336,639	2,270,551
Loans, before unearned loan fees	2,336,639	2,270,551
Non-Covered Loans | CRE - owner occupied | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	28,885	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	28,885	29,397
Non-Covered Loans | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	671,573	611,565
Loans, before unearned loan fees	671,573	611,565
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	88,189	78,647
Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	39	142
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	32,376	23,310
Loans, before unearned loan fees	4,328,486	3,836,572
Commercial and industrial | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,136,049	3,645,384
Commercial and industrial | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	138,559	147,206
Commercial and industrial | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	53,878	43,982
Commercial and industrial | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	32,351	23,240
Commercial and industrial | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	25	70
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	728	743
Loans, before unearned loan fees	368,139	394,794
Residential real estate | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	355,929	390,903
Residential real estate | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	9,088	1,543
Residential real estate | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	3,122	2,348
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	728	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	7,999	6,744
Loans, before unearned loan fees	301,029	235,039
Other | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	301,018	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	11	25
Other | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	7,985	6,672
Other | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 14	$ 72