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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
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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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