Loans and Leases Aging Analysis of Loans and Leases Held for Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	$ 200,958	$ 180,193
Delinquent loans in loan portfolio
30-89 Days Past Due		91,347
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		88,846
Current	24,831,721	23,601,470
Loans held for investment, net	25,032,679	23,781,663
30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	108,303
90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	92,655
Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	169,526	159,316
Delinquent loans in loan portfolio
Loans held for investment, net	13,750,787	13,427,659
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	13,581,261	13,268,343
Mortgages [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	77,704	77,919
Mortgages [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	91,822	81,397
Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	26,540	0
Delinquent loans in loan portfolio
Loans held for investment, net	1,947,627	3,172,293
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	1,921,087	3,172,293
Real Estate Construction [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	26,540	0
Real Estate Construction [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	2,230	17,580
Delinquent loans in loan portfolio
30-89 Days Past Due		10,624
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		6,956
Current	8,974,976	6,761,249
Loans held for investment, net	8,977,206	6,778,829
Commercial Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	2,126
Commercial Portfolio Segment [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	104
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	2,662	3,297
Delinquent loans in loan portfolio
30-89 Days Past Due		2,804
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		493
Current	354,397	399,585
Loans held for investment, net	357,059	402,882
Consumer Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	1,933
Consumer Portfolio Segment [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	729
Asset-based | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	1,142	1,795
Delinquent loans in loan portfolio
30-89 Days Past Due		1,795
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		0
Current	2,949,868	2,086,174
Loans held for investment, net	2,951,010	2,087,969
Asset-based | Commercial Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	1,142
Asset-based | Commercial Portfolio Segment [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0
Venture capital | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	0	5,534
Delinquent loans in loan portfolio
30-89 Days Past Due		5,534
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		0
Current	2,222,097	1,532,242
Loans held for investment, net	2,222,097	1,537,776
Venture capital | Commercial Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	0
Venture capital | Commercial Portfolio Segment [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0
Other commercial | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	1,088	10,251
Delinquent loans in loan portfolio
30-89 Days Past Due		3,295
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		6,956
Current	3,803,011	3,142,833
Loans held for investment, net	3,804,099	3,153,084
Other commercial | Commercial Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	984
Other commercial | Commercial Portfolio Segment [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	104
Commercial Real Estate Construction Loan Receivable [Member] | Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	0	0
Delinquent loans in loan portfolio
Loans held for investment, net	379,387	799,131
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	379,387	799,131
Commercial Real Estate Construction Loan Receivable [Member] | Real Estate Construction [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	0	0
Commercial Real Estate Construction Loan Receivable [Member] | Real Estate Construction [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Residential Real Estate Construction Financing Receivable [Member] | Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	26,540	0
Delinquent loans in loan portfolio
Loans held for investment, net	1,568,240	2,373,162
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	1,541,700	2,373,162
Residential Real Estate Construction Financing Receivable [Member] | Real Estate Construction [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	26,540	0
Residential Real Estate Construction Financing Receivable [Member] | Real Estate Construction [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	0	0
Commercial Real Estate [Member] | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	57,004	50,261
Delinquent loans in loan portfolio
Loans held for investment, net	4,314,637	4,578,772
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	4,257,633	4,528,511
Commercial Real Estate [Member] | Mortgages [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	10,498	27,700
Commercial Real Estate [Member] | Mortgages [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	46,506	22,561
Residential Real Estate [Member] | Mortgages [Member]
Delinquent loans in loan portfolio
Loans held for investment, net	6,089,417	6,041,713
Multi-Family Real Estate Loans | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	35,423	32,206
Delinquent loans in loan portfolio
Loans held for investment, net	6,089,417	6,041,713
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	6,053,994	6,009,507
Multi-Family Real Estate Loans | Mortgages [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	32,887	10,346
Multi-Family Real Estate Loans | Mortgages [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	2,536	21,860
Other Residential Real Estate | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	77,099	76,849
Delinquent loans in loan portfolio
Loans held for investment, net	3,346,733	2,807,174
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	3,269,634	2,730,325
Other Residential Real Estate | Mortgages [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	34,319	39,873
Other Residential Real Estate | Mortgages [Member] | 90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	$ 42,780	$ 36,976