Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 10,884,118	$ 9,737,138
Total	77,569	78,789
Non-Covered Loans
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	10,888,345	9,744,427
Loans, before unearned loan fees	10,888,345	9,744,427
Unearned loan fees, net	(4,227)	(7,289)
Total	10,884,118	9,737,138
Non-Covered Loans | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	16,231	10,437
Non-Covered Loans | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	44,445	4,936
Non-Covered Loans | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	60,676	15,373
Non-Covered Loans | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Loans, before unearned loan fees	10,827,669	9,729,054
Non-Covered Loans | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	4,674,056	3,859,964
Non-Covered Loans | Commercial and industrial | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	3,445	555
Non-Covered Loans | Commercial and industrial | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	9,037	2,373
Non-Covered Loans | Commercial and industrial | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	12,482	2,928
Non-Covered Loans | Commercial and industrial | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	4,661,574	3,857,036
Non-Covered Loans | Commercial - investor owned
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,452,402	2,357,820
Non-Covered Loans | Commercial - investor owned | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,905	0
Non-Covered Loans | Commercial - investor owned | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	18,395	1,135
Non-Covered Loans | Commercial - investor owned | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	20,300	1,135
Non-Covered Loans | Commercial - investor owned | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,432,102	2,356,685
Non-Covered Loans | CRE - owner occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,344,117	2,270,551
Non-Covered Loans | CRE - owner occupied | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	8,409	8,628
Non-Covered Loans | CRE - owner occupied | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	14,142	164
Non-Covered Loans | CRE - owner occupied | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	22,551	8,792
Non-Covered Loans | CRE - owner occupied | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,321,566	2,261,759
Non-Covered Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	760,122	611,565
Non-Covered Loans | Construction and land development | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	770	9
Non-Covered Loans | Construction and land development | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,908	1,192
Non-Covered Loans | Construction and land development | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,678	1,201
Non-Covered Loans | Construction and land development | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	757,444	610,364
Non-Covered Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	371,995	395,537
Non-Covered Loans | Residential real estate | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,620	1,227
Non-Covered Loans | Residential real estate | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	959	0
Non-Covered Loans | Residential real estate | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,579	1,227
Non-Covered Loans | Residential real estate | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	369,416	394,310
Non-Covered Loans | Other
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	285,653	248,990
Non-Covered Loans | Other | Financial Asset, 30-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	82	18
Non-Covered Loans | Other | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	4	72
Non-Covered Loans | Other | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	86	90
Non-Covered Loans | Other | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 285,567	$ 248,900