Loans - Schedule of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	$ 12,344,705	$ 11,800,338
Non-Covered Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonperforming loans	87,270	82,809
Nonaccrual loans	87,173	81,180
Loans over 90 days past due and still accruing interest	97	1,629
Nonaccrual loans with no allowance	52,961	54,511
Loans, including unearned loan fees	12,347,329	11,801,093
Non-Covered Loans \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	48,914	40,311
Non-Covered Loans \| Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	910	8,574
Non-Covered Loans \| Blanket Lien
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	8,659	3,391
Non-Covered Loans \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	156	15,644
Non-Covered Loans \| C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonperforming loans	33,038	27,979
Nonaccrual loans	32,950	26,359
Loans over 90 days past due and still accruing interest	88	1,620
Nonaccrual loans with no allowance	10,153	14,800
Loans, including unearned loan fees	5,472,681	5,236,473
Non-Covered Loans \| C&I \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	8,750	0
Non-Covered Loans \| C&I \| Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	5	19
Non-Covered Loans \| C&I \| Blanket Lien
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	8,659	3,391
Non-Covered Loans \| C&I \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	156	15,644
Non-Covered Loans \| Commercial - investor owned
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonperforming loans	25,573	36,988
Nonaccrual loans	25,573	36,988
Loans over 90 days past due and still accruing interest	0	0
Nonaccrual loans with no allowance	24,590	23,685
Loans, including unearned loan fees	3,237,616	2,986,906
Non-Covered Loans \| Commercial - investor owned \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	23,695	35,701
Non-Covered Loans \| Commercial - investor owned \| Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	0
Non-Covered Loans \| Commercial - investor owned \| Blanket Lien
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	0
Non-Covered Loans \| Commercial - investor owned \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	0
Non-Covered Loans \| Commercial - owner occupied
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonperforming loans	25,705	9,338
Nonaccrual loans	25,705	9,338
Loans over 90 days past due and still accruing interest	0	0
Nonaccrual loans with no allowance	15,869	7,927
Loans, including unearned loan fees	2,482,819	2,460,761
Non-Covered Loans \| Commercial - owner occupied \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	15,096	4,610
Non-Covered Loans \| Commercial - owner occupied \| Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	456
Non-Covered Loans \| Commercial - owner occupied \| Blanket Lien
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	0
Non-Covered Loans \| Commercial - owner occupied \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	0
Non-Covered Loans \| Construction and land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonperforming loans	1,729	155
Nonaccrual loans	1,729	155
Loans over 90 days past due and still accruing interest	0	0
Nonaccrual loans with no allowance	1,373	0
Loans, including unearned loan fees	747,202	689,357
Non-Covered Loans \| Construction and land development \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	1,373
Non-Covered Loans \| Construction and land development \| Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0
Non-Covered Loans \| Construction and land development \| Blanket Lien
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0
Non-Covered Loans \| Construction and land development \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0
Non-Covered Loans \| Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonperforming loans	1,216	8,340
Nonaccrual loans	1,216	8,340
Loans over 90 days past due and still accruing interest	0	0
Nonaccrual loans with no allowance	976	8,099
Loans, including unearned loan fees	356,507	367,127
Non-Covered Loans \| Residential \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	0
Non-Covered Loans \| Residential \| Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	905	8,099
Non-Covered Loans \| Residential \| Blanket Lien
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	0
Non-Covered Loans \| Residential \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	0
Non-Covered Loans \| Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonperforming loans	9	9
Nonaccrual loans	0	0
Loans over 90 days past due and still accruing interest	9	9
Nonaccrual loans with no allowance	0	0
Loans, including unearned loan fees	$ 50,504	$ 60,469

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Amortized cost excluding accrued interest, of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Amortized cost of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

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