Loans - Recorded Investment in Nonperforming Loans by Category (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	$ 11,692,780	$ 11,800,338
Non-Covered Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccrual	60,558	81,180
Loans over 90 days past due and still accruing interest	4,383	1,629
Total nonperforming loans	64,941	82,809
Loans, including unearned loan fees	11,693,751	11,801,093
Nonaccrual loans with no allowance	34,310	54,511
Non-Covered Loans \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	37,756	40,311
Non-Covered Loans \| Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	3,268	8,574
Non-Covered Loans \| Blanket Lien
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	5,605	3,391
Non-Covered Loans \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	3,901	15,644
Non-Covered Loans \| C&I
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccrual	13,900	26,359
Loans over 90 days past due and still accruing interest	4,357	1,620
Total nonperforming loans	18,257	27,979
Loans, including unearned loan fees	5,172,817	5,236,473
Nonaccrual loans with no allowance	667	14,800
Non-Covered Loans \| C&I \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0	0
Non-Covered Loans \| C&I \| Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	13	19
Non-Covered Loans \| C&I \| Blanket Lien
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	5,605	3,391
Non-Covered Loans \| C&I \| Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	3,441	15,644
Non-Covered Loans \| Commercial - investor owned
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccrual	34,194	36,988
Loans over 90 days past due and still accruing interest	0	0
Total nonperforming loans	34,194	36,988
Loans, including unearned loan fees	2,960,830	2,986,906
Nonaccrual loans with no allowance	24,958	23,685
Non-Covered Loans \| Commercial - investor owned \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	32,691	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]
Nonaccrual	7,983	9,338
Loans over 90 days past due and still accruing interest	0	0
Total nonperforming loans	7,983	9,338
Loans, including unearned loan fees	2,487,565	2,460,761
Nonaccrual loans with no allowance	4,970	7,927
Non-Covered Loans \| Commercial - owner occupied \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	5,065	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]
Nonaccrual	1,505	155
Loans over 90 days past due and still accruing interest	0	0
Total nonperforming loans	1,505	155
Loans, including unearned loan fees	669,921	689,357
Nonaccrual loans with no allowance	980	0
Non-Covered Loans \| Construction and land development \| CRE
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	0
Non-Covered Loans \| Construction and land development \| Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Loans, including unearned loan fees	980
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]
Nonaccrual	2,976	8,340
Loans over 90 days past due and still accruing interest	0	0
Total nonperforming loans	2,976	8,340
Loans, including unearned loan fees	345,568	367,127
Nonaccrual loans with no allowance	2,735	8,099
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	2,275	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	460	0
Non-Covered Loans \| Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Nonaccrual	0	0
Loans over 90 days past due and still accruing interest	26	9
Total nonperforming loans	26	9
Loans, including unearned loan fees	57,050	60,469
Nonaccrual loans with no allowance	$ 0	$ 0

Financing Receivable, Excluding Accrued Interset, Nonperforming

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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 excluding accrued interest, of financing receivable on nonaccrual status. 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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