Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Total	$ 11,298,763	$ 11,220,355
Loans, including unearned loan fees	11,155,819	11,082,405
Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Total	11,299,246	11,220,818
Loans, including unearned loan fees	11,298,763	11,220,355
Unearned loan fees, net	(483)	(463)
Loans, before unearned loan fees, after allowance	11,299,246	11,220,818
Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	4,733,824	4,720,428
Loans, including unearned loan fees	4,733,824	4,720,428
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Total	2,675,424	2,607,755
Loans, including unearned loan fees	2,675,424	2,607,755
Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	2,364,214	2,359,956
Loans, including unearned loan fees	2,364,214	2,359,956
Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	882,313	892,563
Loans, including unearned loan fees	882,313	892,563
Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	365,951	358,923
Loans, including unearned loan fees	365,951	358,923
Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	277,520	281,193
Loans, including unearned loan fees	277,520	281,193
Total Past Due | Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	163,133	67,874
Total Past Due | Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	22,611	14,176
Total Past Due | Non-Covered Loans | Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Total	83,530	15,710
Total Past Due | Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	33,054	29,133
Total Past Due | Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	16,363	5,721
Total Past Due | Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	7,418	3,091
Total Past Due | Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	157	43
30-89 Days Past Due | Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	44,899	16,835
30-89 Days Past Due | Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	11,422	1,948
30-89 Days Past Due | Non-Covered Loans | Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Total	4,565	1,377
30-89 Days Past Due | Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	10,803	10,542
30-89 Days Past Due | Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	16,363	101
30-89 Days Past Due | Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	1,634	2,833
30-89 Days Past Due | Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	112	34
90 or More Days Past Due | Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	118,234	51,039
90 or More Days Past Due | Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	11,189	12,228
90 or More Days Past Due | Non-Covered Loans | Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Total	78,965	14,333
90 or More Days Past Due | Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	22,251	18,591
90 or More Days Past Due | Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	0	5,620
90 or More Days Past Due | Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	5,784	258
90 or More Days Past Due | Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	45	9
Current | Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	11,136,113	11,152,944
Current | Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	4,711,213	4,706,252
Current | Non-Covered Loans | Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Total	2,591,894	2,592,045
Current | Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	2,331,160	2,330,823
Current | Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	865,950	886,842
Current | Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	358,533	355,832
Current | Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	$ 277,363	$ 281,150