Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Total	$ 11,000,007	$ 10,884,118
Loans, including unearned loan fees	10,860,543	10,749,347
Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Total	11,002,393	10,888,345
Loans, including unearned loan fees	11,000,007	10,884,118
Unearned loan fees, net	(2,386)	(4,227)
Loans, before unearned loan fees, after allowance	11,002,393	10,888,345
Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	4,622,028	4,674,056
Loans, including unearned loan fees	4,622,028	4,674,056
Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member]
Financing Receivable, Past Due [Line Items]
Total	2,468,895	2,452,402
Loans, including unearned loan fees	2,468,895	2,452,402
Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	2,380,957	2,344,117
Loans, including unearned loan fees	2,380,957	2,344,117
Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	893,776	760,122
Loans, including unearned loan fees	893,776	760,122
Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	351,588	371,995
Loans, including unearned loan fees	351,588	371,995
Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	285,149	285,653
Loans, including unearned loan fees	285,149	285,653
Total Past Due | Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	76,752	60,676
Total Past Due | Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	18,430	12,482
Total Past Due | Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member]
Financing Receivable, Past Due [Line Items]
Total	17,700	20,300
Total Past Due | Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	34,729	22,551
Total Past Due | Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	5,398	2,678
Total Past Due | Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	461	2,579
Total Past Due | Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	34	86
30-89 Days Past Due | Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	29,732	16,231
30-89 Days Past Due | Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	9,192	3,445
30-89 Days Past Due | Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member]
Financing Receivable, Past Due [Line Items]
Total	245	1,905
30-89 Days Past Due | Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	17,058	8,409
30-89 Days Past Due | Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	2,750	770
30-89 Days Past Due | Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	461	1,620
30-89 Days Past Due | Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	26	82
90 or More Days Past Due | Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	47,020	44,445
90 or More Days Past Due | Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	9,238	9,037
90 or More Days Past Due | Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member]
Financing Receivable, Past Due [Line Items]
Total	17,455	18,395
90 or More Days Past Due | Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	17,671	14,142
90 or More Days Past Due | Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	2,648	1,908
90 or More Days Past Due | Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	0	959
90 or More Days Past Due | Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	8	4
Current | Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	10,925,641	10,827,669
Current | Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total	4,603,598	4,661,574
Current | Non-Covered Loans | Commercial Real Estate Investor Owned Financing Receivable [Member]
Financing Receivable, Past Due [Line Items]
Total	2,451,195	2,432,102
Current | Non-Covered Loans | Commercial - owner occupied
Financing Receivable, Past Due [Line Items]
Total	2,346,228	2,321,566
Current | Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Total	888,378	757,444
Current | Non-Covered Loans | Residential
Financing Receivable, Past Due [Line Items]
Total	351,127	369,416
Current | Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Total	$ 285,115	$ 285,567