Loans and Leases Aging Analysis of Loans and Leases Held for Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	$ 180,193	$ 144,188
Delinquent loans in loan portfolio
30-89 Days Past Due		113,307
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		30,881
Current	23,601,470	25,345,499
Loans held for investment, net	23,781,663	25,489,687
30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	91,347
90 Or More Days Past Due
Delinquent loans in loan portfolio
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due	88,846
Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	159,316	128,491
Delinquent loans in loan portfolio
Loans held for investment, net	13,427,659	16,111,985
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	13,268,343	15,983,494
Mortgages [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	77,919	107,962
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	81,397	20,529
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	3,172,293	3,159,269
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	3,172,293	3,159,269
Real Estate Construction [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	0	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	17,580	11,566
Delinquent loans in loan portfolio
30-89 Days Past Due		1,884
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		9,682
Current	6,761,249	5,753,741
Loans held for investment, net	6,778,829	5,765,307
Commercial Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	10,624
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	6,956
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	3,297	4,131
Delinquent loans in loan portfolio
30-89 Days Past Due		3,461
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		670
Current	399,585	448,995
Loans held for investment, net	402,882	453,126
Consumer Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	2,804
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	493
Asset-based | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	1,795	3,297
Delinquent loans in loan portfolio
30-89 Days Past Due		608
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		2,689
Current	2,086,174	2,185,788
Loans held for investment, net	2,087,969	2,189,085
Asset-based | Commercial Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	1,795
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	5,534	0
Delinquent loans in loan portfolio
30-89 Days Past Due		0
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		0
Current	1,532,242	1,446,362
Loans held for investment, net	1,537,776	1,446,362
Venture capital | Commercial Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	5,534
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	10,251	8,269
Delinquent loans in loan portfolio
30-89 Days Past Due		1,276
Loan Receivable, Recorded Investment, Equal to Greater than 90 Days Past Due		6,993
Current	3,142,833	2,121,591
Loans held for investment, net	3,153,084	2,129,860
Other commercial | Commercial Portfolio Segment [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	3,295
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	6,956
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	799,131	759,585
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	799,131	759,585
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	0	0
Delinquent loans in loan portfolio
Loans held for investment, net	2,373,162	2,399,684
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	2,373,162	2,399,684
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	0	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	50,261	27,786
Delinquent loans in loan portfolio
Loans held for investment, net	4,578,772	5,026,497
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	4,528,511	4,998,711
Commercial Real Estate [Member] | Mortgages [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	27,700	12,618
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	22,561	15,168
Residential Real Estate [Member] | Mortgages [Member]
Delinquent loans in loan portfolio
Loans held for investment, net	6,041,713	6,025,179
Multi-Family Real Estate Loans | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	32,206	3,322
Delinquent loans in loan portfolio
Loans held for investment, net	6,041,713	6,025,179
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	6,009,507	6,021,857
Multi-Family Real Estate Loans | Mortgages [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	10,346	2,302
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	21,860	1,020
Other Residential Real Estate | Mortgages [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable Recorded Investment Total Past Due	76,849	97,383
Delinquent loans in loan portfolio
Loans held for investment, net	2,807,174	5,060,309
Loans And Leases Receivable Net Of Deferred Income, Not Past Due	2,730,325	4,962,926
Other Residential Real Estate | Mortgages [Member] | 30 To 89 Days Past Due
Delinquent loans in loan portfolio
30-89 Days Past Due	39,873	93,042
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	$ 36,976	$ 4,341