Loans - Summary of Performing and Non Performing Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ (10,940,114)	$ (10,749,347)
Loans, before unearned loan fees	11,079,892	10,884,118
Non-Covered Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(11,079,892)	(10,884,118)
Loans, before unearned loan fees	11,081,653	10,888,345
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(2,526,696)	(2,452,402)
Loans, before unearned loan fees	2,526,696	2,452,402
Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(2,381,636)	(2,344,117)
Loans, before unearned loan fees	2,381,636	2,344,117
Non-Covered Loans | Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(896,768)	(760,122)
Loans, before unearned loan fees	896,768	760,122
Total
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(78,690)	(77,569)
Total | Non-Covered Loans | Commercial - investor owned | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	17,352	17,885
Total | Non-Covered Loans | Commercial - owner occupied | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	27,605	28,373
Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(78,464)	(77,452)
Performing | Non-Covered Loans | Commercial - investor owned | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	17,352	17,885
Performing | Non-Covered Loans | Commercial - owner occupied | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	27,605	28,373
Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(226)	(117)
Non Performing | Non-Covered Loans | Commercial - investor owned | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0	0
Non Performing | Non-Covered Loans | Commercial - owner occupied | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	0	0
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,595,211	4,646,371
Commercial and industrial | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,321,703	4,475,490
Commercial and industrial | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	176,667	89,066
Commercial and industrial | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	96,841	81,815
Commercial and industrial | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(33,277)	(26,188)
Commercial and industrial | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(33,051)	(26,076)
Commercial and industrial | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(226)	(112)
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	354,625	371,476
Residential | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	348,336	358,299
Residential | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	4,395	2,812
Residential | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	1,894	10,365
Residential | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(654)	(712)
Residential | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(654)	(712)
Residential | 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]
Loans, before unearned loan fees	284,822	270,964
Other | Pass (1-6)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	272,618	244,839
Other | Special Mention (7)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	12,199	26,117
Other | Classified (8-9)
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, before unearned loan fees	5	8
Other | Total
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(198)	(4,411)
Other | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	(198)	(4,406)
Other | Non Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Investment on loans by payment activity	$ 0	$ (5)