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, 2024	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Nonaccrual	$ 189,605	$ 189,605	$ 62,527
Financing Receivable, Nonaccrual, Interest Income		13	41
Loans held for investment, net	23,781,663	23,781,663	25,489,687
Performing Financing Receivable [Member]
Loans held for investment, net	23,592,058	23,592,058	25,427,160
Mortgages [Member]
Financing Receivable, Nonaccrual	167,206	167,206	47,730
Financing Receivable, Nonaccrual, Interest Income		13	31
Loans held for investment, net	13,427,659	13,427,659	16,111,985
Mortgages [Member] | Performing Financing Receivable [Member]
Loans held for investment, net	13,260,453	13,260,453	16,064,255
Real Estate Construction [Member]
Financing Receivable, Nonaccrual	0	0	0
Financing Receivable, Nonaccrual, Interest Income		0	0
Loans held for investment, net	3,172,293	3,172,293	3,159,269
Real Estate Construction [Member] | Performing Financing Receivable [Member]
Loans held for investment, net	3,172,293	3,172,293	3,159,269
Real Estate Construction [Member] | Commercial Real Estate Construction Loan Receivable [Member]
Financing Receivable, Nonaccrual	0	0	0
Loans held for investment, net	799,131	799,131	759,585
Real Estate Construction [Member] | Commercial Real Estate Construction Loan Receivable [Member] | Performing Financing Receivable [Member]
Loans held for investment, net	799,131	799,131	759,585
Real Estate Construction [Member] | Commercial Real Estate Construction Loan Receivable [Member] | No Finance Receivable Allowance
Financing Receivable, Nonaccrual, Interest Income		0	0
Financing Receivable, Nonaccrual, No Allowance	0	0	0
Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member]
Financing Receivable, Nonaccrual	0	0	0
Loans held for investment, net	2,373,162	2,373,162	2,399,684
Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member] | Performing Financing Receivable [Member]
Loans held for investment, net	2,373,162	2,373,162	2,399,684
Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member] | Finance Receivable Allowance
Financing Receivable, Nonaccrual	0	0	0
Financing Receivable, Nonaccrual, Interest Income		0	0
Real Estate Construction [Member] | Residential Real Estate Construction Financing Receivable [Member] | No Finance Receivable Allowance
Financing Receivable, Nonaccrual, Interest Income		0	0
Financing Receivable, Nonaccrual, No Allowance	0	0	0
Commercial Portfolio Segment [Member]
Financing Receivable, Nonaccrual	21,775	21,775	13,986
Financing Receivable, Nonaccrual, Interest Income		0	10
Loans held for investment, net	6,778,829	6,778,829	5,765,307
Commercial Portfolio Segment [Member] | Performing Financing Receivable [Member]
Loans held for investment, net	6,757,054	6,757,054	5,751,321
Commercial Portfolio Segment [Member] | Asset-based
Financing Receivable, Nonaccrual	1,940	1,940	2,689
Loans held for investment, net	2,087,969	2,087,969	2,189,085
Commercial Portfolio Segment [Member] | Asset-based | Performing Financing Receivable [Member]
Loans held for investment, net	2,086,029	2,086,029	2,186,396
Commercial Portfolio Segment [Member] | Asset-based | Finance Receivable Allowance
Financing Receivable, Nonaccrual	0	0	0
Financing Receivable, Nonaccrual, Interest Income		0	0
Commercial Portfolio Segment [Member] | Asset-based | No Finance Receivable Allowance
Financing Receivable, Nonaccrual, Interest Income		0	0
Financing Receivable, Nonaccrual, No Allowance	1,940	1,940	2,689
Commercial Portfolio Segment [Member] | Venture capital
Financing Receivable, Nonaccrual	6,291	6,291	325
Financing Receivable, Nonaccrual, No Allowance	5,534	5,534	325
Loans held for investment, net	1,537,776	1,537,776	1,446,362
Commercial Portfolio Segment [Member] | Venture capital | Performing Financing Receivable [Member]
Loans held for investment, net	1,531,485	1,531,485	1,446,037
Commercial Portfolio Segment [Member] | Venture capital | Finance Receivable Allowance
Financing Receivable, Nonaccrual	757	757	0
Financing Receivable, Nonaccrual, Interest Income		0	0
Commercial Portfolio Segment [Member] | Venture capital | No Finance Receivable Allowance
Financing Receivable, Nonaccrual, Interest Income		0	0
Commercial Portfolio Segment [Member] | Other commercial
Financing Receivable, Nonaccrual	13,544	13,544	10,972
Loans held for investment, net	3,153,084	3,153,084	2,129,860
Commercial Portfolio Segment [Member] | Other commercial | Performing Financing Receivable [Member]
Loans held for investment, net	3,139,540	3,139,540	2,118,888
Commercial Portfolio Segment [Member] | Other commercial | Finance Receivable Allowance
Financing Receivable, Nonaccrual	8,885	8,885	1,613
Financing Receivable, Nonaccrual, Interest Income		0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Nonaccrual	624	624	811
Financing Receivable, Nonaccrual, Interest Income		0	0
Loans held for investment, net	402,882	402,882	453,126
Consumer Portfolio Segment [Member] | Performing Financing Receivable [Member]
Loans held for investment, net	402,258	402,258	452,315
Consumer Portfolio Segment [Member] | Finance Receivable Allowance
Financing Receivable, Nonaccrual	624	624	811
Financing Receivable, Nonaccrual, Interest Income		0	0
Consumer Portfolio Segment [Member] | No Finance Receivable Allowance
Financing Receivable, Nonaccrual, Interest Income		0	0
Financing Receivable, Nonaccrual, No Allowance	0	0	0
Other commercial | Other commercial | No Finance Receivable Allowance
Financing Receivable, Nonaccrual, Interest Income		0	10
Financing Receivable, Nonaccrual, No Allowance	4,659	4,659	9,359
Commercial Real Estate [Member] | Mortgages [Member]
Financing Receivable, Nonaccrual	97,655	97,655	15,669
Loans held for investment, net	4,578,772	4,578,772	5,026,497
Commercial Real Estate [Member] | Mortgages [Member] | Performing Financing Receivable [Member]
Loans held for investment, net	4,481,117	4,481,117	5,010,828
Commercial Real Estate [Member] | Mortgages [Member] | Finance Receivable Allowance
Financing Receivable, Nonaccrual	9,864	9,864	385
Financing Receivable, Nonaccrual, Interest Income		0	0
Commercial Real Estate [Member] | Mortgages [Member] | No Finance Receivable Allowance
Financing Receivable, Nonaccrual, Interest Income		13	31
Financing Receivable, Nonaccrual, No Allowance	87,791	87,791	15,284
Residential Real Estate [Member] | Mortgages [Member]
Loans held for investment, net	6,041,713	6,041,713	6,025,179
Residential Real Estate [Member] | Mortgages [Member] | Finance Receivable Allowance
Financing Receivable, Nonaccrual	0	0	0
Financing Receivable, Nonaccrual, Interest Income		0	0
Residential Real Estate [Member] | Mortgages [Member] | No Finance Receivable Allowance
Financing Receivable, Nonaccrual, Interest Income		0	0
Financing Receivable, Nonaccrual, No Allowance	22,763	22,763	1,020
Other Residential Real Estate | Mortgages [Member]
Financing Receivable, Nonaccrual	46,788	46,788	31,041
Financing Receivable, Nonaccrual, No Allowance	46,565	46,565	0
Loans held for investment, net	2,807,174	2,807,174	5,060,309
Other Residential Real Estate | Mortgages [Member] | Performing Financing Receivable [Member]
Loans held for investment, net	2,760,386	2,760,386	5,029,268
Other Residential Real Estate | Mortgages [Member] | Finance Receivable Allowance
Financing Receivable, Nonaccrual	223	223	0
Financing Receivable, Nonaccrual, Interest Income	0	514
Other Residential Real Estate | Mortgages [Member] | No Finance Receivable Allowance
Financing Receivable, Nonaccrual, Interest Income	0	30,527
Multi-Family Real Estate Loans | Mortgages [Member]
Financing Receivable, Nonaccrual	22,763	22,763	1,020
Loans held for investment, net	6,041,713	6,041,713	6,025,179
Multi-Family Real Estate Loans | Mortgages [Member] | Performing Financing Receivable [Member]
Loans held for investment, net	$ 6,018,950	$ 6,018,950	$ 6,024,159