Loans - Credit Quality Based on Aging Status (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	$ 11,660,316	$ 11,082,405
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	11,800,338	11,220,355
Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	11,066,119	10,575,150
Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	335,627	347,196
Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	328,941	189,883
Non-Covered Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	11,800,338	11,220,355
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	11,801,093	11,220,818
Non-Covered Loans \| Commercial Real Estate Investor Owned Financing Receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,986,906	2,607,755
Non-Covered Loans \| Commercial Real Estate Owner Occupied Financing Receivable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,460,761	2,359,956
Non-Covered Loans \| Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	689,357	892,563
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	5,208,520	4,655,779
Commercial and Industrial Portfolio Segment [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	4,909,871	4,432,837
Commercial and Industrial Portfolio Segment [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	147,216	151,381
Commercial and Industrial Portfolio Segment [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	151,433	71,561
Residential Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	367,093	358,616
Residential Portfolio Segment [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	342,380	332,318
Residential Portfolio Segment [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	6,548	4,126
Residential Portfolio Segment [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	18,165	22,172
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	56,113	276,512
Consumer \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	56,101	264,741
Consumer \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	11,766
Consumer \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	12	5
Performing Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	69,324	108,106
Performing Financial Instruments [Member] \| Non-Covered Loans \| Commercial Real Estate Investor Owned Financing Receivable [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	16,323	17,175
Performing Financial Instruments [Member] \| Non-Covered Loans \| Commercial Real Estate Owner Occupied Financing Receivable [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	26,121	27,349
Performing Financial Instruments [Member] \| Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	22,778	60,899
Performing Financial Instruments [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	589	647
Performing Financial Instruments [Member] \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	3,513	2,036
Nonperforming Financial Instruments [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	327	20
Nonperforming Financial Instruments [Member] \| Non-Covered Loans \| Commercial Real Estate Investor Owned Financing Receivable [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Nonperforming Financial Instruments [Member] \| Non-Covered Loans \| Commercial Real Estate Owner Occupied Financing Receivable [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0	0
Nonperforming Financial Instruments [Member] \| Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	318	11
Nonperforming Financial Instruments [Member] \| Residential Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	0	0
Nonperforming Financial Instruments [Member] \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	9	9
Performing And Nonperforming Financial Instruments
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	69,651	108,126
Performing And Nonperforming Financial Instruments \| Non-Covered Loans \| Commercial Real Estate Investor Owned Financing Receivable [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	16,323	17,175
Performing And Nonperforming Financial Instruments \| Non-Covered Loans \| Commercial Real Estate Owner Occupied Financing Receivable [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	26,121	27,349
Performing And Nonperforming Financial Instruments \| Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	23,096	60,910
Performing And Nonperforming Financial Instruments \| Residential Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	589	647
Performing And Nonperforming Financial Instruments \| Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	$ 3,522	$ 2,045