Loans and Leases Nonaccrual Loans and Leases by Loan Portfolio Segment and Class (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	$ 159,168	$ 159,168	$ 189,605
Financing Receivable, Nonaccrual, Interest Income		1,243	13
Loans held for investment, net	25,032,679	25,032,679	23,781,663
Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	24,873,511	24,873,511	23,592,058
Mortgages [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	154,676	154,676	167,206
Financing Receivable, Nonaccrual, Interest Income		64	13
Loans held for investment, net	13,750,787	13,750,787	13,427,659
Mortgages [Member] | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	13,596,111	13,596,111	13,260,453
Real Estate Construction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	0	0	0
Financing Receivable, Nonaccrual, Interest Income		0	0
Loans held for investment, net	1,947,627	1,947,627	3,172,293
Real Estate Construction [Member] | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	1,947,627	1,947,627	3,172,293
Real Estate Construction [Member] | Commercial Real Estate Construction Loan Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	0	0	0
Loans held for investment, net	379,387	379,387	799,131
Real Estate Construction [Member] | Commercial Real Estate Construction Loan Receivable [Member] | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	379,387	379,387	799,131
Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	0	0	0
Loans held for investment, net	1,568,240	1,568,240	2,373,162
Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member] | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	1,568,240	1,568,240	2,373,162
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	3,135	3,135	21,775
Financing Receivable, Nonaccrual, Interest Income		1,179	0
Loans held for investment, net	8,977,206	8,977,206	6,778,829
Commercial Portfolio Segment [Member] | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	8,974,071	8,974,071	6,757,054
Commercial Portfolio Segment [Member] | Asset-based
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	0	0	1,940
Loans held for investment, net	2,951,010	2,951,010	2,087,969
Commercial Portfolio Segment [Member] | Asset-based | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	2,951,010	2,951,010	2,086,029
Commercial Portfolio Segment [Member] | Asset-based | No Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual, Interest Income		0	0
Financing Receivable, Nonaccrual, No Allowance	0	0	1,940
Commercial Portfolio Segment [Member] | Venture capital
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	625	625	6,291
Financing Receivable, Nonaccrual, No Allowance	625	625	5,534
Loans held for investment, net	2,222,097	2,222,097	1,537,776
Commercial Portfolio Segment [Member] | Venture capital | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	2,221,472	2,221,472	1,531,485
Commercial Portfolio Segment [Member] | Venture capital | Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	0	0	757
Financing Receivable, Nonaccrual, Interest Income		0	0
Commercial Portfolio Segment [Member] | Venture capital | No Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual, Interest Income		0	0
Commercial Portfolio Segment [Member] | Other commercial
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	2,510	2,510	13,544
Loans held for investment, net	3,804,099	3,804,099	3,153,084
Commercial Portfolio Segment [Member] | Other commercial | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	3,801,589	3,801,589	3,139,540
Commercial Portfolio Segment [Member] | Other commercial | Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	1,264	1,264	8,885
Financing Receivable, Nonaccrual, Interest Income		0	0
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	1,357	1,357	624
Financing Receivable, Nonaccrual, Interest Income		0	0
Loans held for investment, net	357,059	357,059	402,882
Consumer Portfolio Segment [Member] | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	355,702	355,702	402,258
Consumer Portfolio Segment [Member] | Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	1,358	1,358	624
Financing Receivable, Nonaccrual, Interest Income		0	0
Consumer Portfolio Segment [Member] | No Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual, Interest Income		0	0
Financing Receivable, Nonaccrual, No Allowance			0
Financing Receivable, Nonaccrual, No Allowance, Including Deferred Fees	(1)	(1)
Other commercial | Other commercial | No Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual, Interest Income		1,179	0
Financing Receivable, Nonaccrual, No Allowance	1,246	1,246	4,659
Commercial Real Estate [Member] | Mortgages [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	93,334	93,334	97,655
Loans held for investment, net	4,314,637	4,314,637	4,578,772
Commercial Real Estate [Member] | Mortgages [Member] | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	4,221,303	4,221,303	4,481,117
Commercial Real Estate [Member] | Mortgages [Member] | Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	26,594	26,594	9,864
Financing Receivable, Nonaccrual, Interest Income		0	0
Commercial Real Estate [Member] | Mortgages [Member] | No Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual, Interest Income		64	13
Financing Receivable, Nonaccrual, No Allowance	66,740	66,740	87,791
Residential Real Estate [Member] | Mortgages [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	6,089,417	6,089,417	6,041,713
Residential Real Estate [Member] | Mortgages [Member] | Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	0	0	0
Financing Receivable, Nonaccrual, Interest Income		0	0
Residential Real Estate [Member] | Mortgages [Member] | No Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual, Interest Income		0	0
Financing Receivable, Nonaccrual, No Allowance	3,358	3,358	22,763
Other Residential Real Estate | Mortgages [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	57,984	57,984	46,788
Financing Receivable, Nonaccrual, No Allowance	57,831	57,831	0
Loans held for investment, net	3,346,733	3,346,733	2,807,174
Other Residential Real Estate | Mortgages [Member] | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	3,288,749	3,288,749	2,760,386
Other Residential Real Estate | Mortgages [Member] | Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	153	153	0
Financing Receivable, Nonaccrual, Interest Income	0	223
Other Residential Real Estate | Mortgages [Member] | No Finance Receivable Allowance
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual, Interest Income	0	46,565
Multi-Family Real Estate Loans | Mortgages [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Nonaccrual	3,358	3,358	22,763
Loans held for investment, net	6,089,417	6,089,417	6,041,713
Multi-Family Real Estate Loans | Mortgages [Member] | Performing Financing Receivable [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment, net	$ 6,086,059	$ 6,086,059	$ 6,018,950