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Loans and Leases - Aging Analysis of Loans and Leases Held for Investment (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	$ 200,640	$ 180,193
Loans held for investment, net	24,126,527	23,781,663	$ 25,473,022
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	23,925,887	23,601,470
30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	100,664	91,347
90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	99,976	88,846
Real Estate Mortgage
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	189,404	159,316
Loans held for investment, net	13,492,658	13,427,659	15,967,399
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	13,303,254	13,268,343
Real Estate Mortgage | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	95,826	77,919
Real Estate Mortgage | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	93,578	81,397
Real Estate Construction and Land
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	0	0
Loans held for investment, net	2,861,038	3,172,293	3,245,354
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	2,861,038	3,172,293
Real Estate Construction and Land | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	0	0
Real Estate Construction and Land | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	0	0
Commercial
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	8,260	17,580
Loans held for investment, net	7,378,799	6,778,829	5,820,567
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	7,370,539	6,761,249
Commercial | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	2,686	10,624
Commercial | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	5,574	6,956
Consumer
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	2,976	3,297
Loans held for investment, net	394,032	402,882	$ 439,702
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	391,056	399,585
Consumer | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	2,152	2,804
Consumer | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	824	493
Asset Based | Commercial
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	1,517	1,795
Loans held for investment, net	2,305,325	2,087,969
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	2,303,808	2,086,174
Asset Based | Commercial | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	524	1,795
Asset Based | Commercial | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	993	0
Venture Capital Loans | Commercial
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	0	5,534
Loans held for investment, net	1,733,074	1,537,776
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	1,733,074	1,532,242
Venture Capital Loans | Commercial | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	0	5,534
Venture Capital Loans | Commercial | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	0	0
Other Commercial | Commercial
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	6,743	10,251
Loans held for investment, net	3,340,400	3,153,084
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	3,333,657	3,142,833
Other Commercial | Commercial | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	2,162	3,295
Other Commercial | Commercial | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	4,581	6,956
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	0	0
Loans held for investment, net	733,684	799,131
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	733,684	799,131
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	0	0
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	0	0
Residential Real Estate Construction Financing Receivable | Real Estate Construction and Land
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	0	0
Loans held for investment, net	2,127,354	2,373,162
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	2,127,354	2,373,162
Residential Real Estate Construction Financing Receivable | Real Estate Construction and Land | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	0	0
Residential Real Estate Construction Financing Receivable | Real Estate Construction and Land | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	0	0
Commercial | Real Estate Mortgage
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	92,100	50,261
Loans held for investment, net	4,489,543	4,578,772
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	4,397,443	4,528,511
Commercial | Real Estate Mortgage | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	54,667	27,700
Commercial | Real Estate Mortgage | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	37,433	22,561
Multi-Family Real Estate Loans | Real Estate Mortgage
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	23,529	32,206
Loans held for investment, net	6,216,084	6,041,713
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	6,192,555	6,009,507
Multi-Family Real Estate Loans | Real Estate Mortgage | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	1,795	10,346
Multi-Family Real Estate Loans | Real Estate Mortgage | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	21,734	21,860
Other Residential Real Estate | Real Estate Mortgage
Financing Receivable, Past Due [Line Items]
Financing Receivable Recorded Investment Total Past Due	73,775	76,849
Loans held for investment, net	2,787,031	2,807,174
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current	2,713,256	2,730,325
Other Residential Real Estate | Real Estate Mortgage | 30 TO 89 Days Past Due
Financing Receivable, Past Due [Line Items]
30-89 Days Past Due	39,364	39,873
Other Residential Real Estate | Real Estate Mortgage | 90 Or More Days Past Due
Financing Receivable, Past Due [Line Items]
90 or More Days Past Due	$ 34,411	$ 36,976

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Financing receivable recorded investment 30 to 89 days past due.

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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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-Topic 326
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