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Loans and Leases - Credit Risk Rating Categories for 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, Excluding Accrued Interest, before Allowance for Credit Loss, Current | $ 23,925,887 | $ 23,601,470 |
Loans held for investment, net | 24,126,527 | 23,781,663 | $ 25,473,022
Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 13,303,254 | 13,268,343 |
Loans held for investment, net | 13,492,658 | 13,427,659 | 15,967,399
Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 2,861,038 | 3,172,293 |
Loans held for investment, net | 2,861,038 | 3,172,293 | 3,245,354
Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 7,370,539 | 6,761,249 |
Loans held for investment, net | 7,378,799 | 6,778,829 | 5,820,567
Consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 391,056 | 399,585 |
Loans held for investment, net | 394,032 | 402,882 | $ 439,702
Classified |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 764,723 | 563,502 |
Classified | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 578,277 | 462,435 |
Classified | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 72,444 | 0 |
Classified | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 112,728 | 100,358 |
Classified | Consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 1,274 | 709 |
Special Mention |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 937,014 |  |
Loans held for investment, net |  | 1,097,315 |
Special Mention | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 450,717 |  |
Loans held for investment, net |  | 565,055 |
Special Mention | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 263,882 |  |
Loans held for investment, net |  | 351,244 |
Special Mention | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 217,177 |  |
Loans held for investment, net |  | 173,608 |
Special Mention | Consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 5,238 |  |
Loans held for investment, net |  | 7,408 |
Pass |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 22,120,846 |
Loans held for investment, net | 22,424,790 |  |
Pass | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 12,400,169 |
Loans held for investment, net | 12,463,664 |  |
Pass | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 2,821,049 |
Loans held for investment, net | 2,524,712 |  |
Pass | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 6,504,863 |
Loans held for investment, net | 7,048,894 |  |
Pass | Consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 394,765 |
Loans held for investment, net | 387,520 |  |
Venture Capital Loans | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 1,733,074 | 1,532,242 |
Loans held for investment, net | 1,733,074 | 1,537,776 |
Venture Capital Loans | Classified | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 84,412 | 75,406 |
Venture Capital Loans | Special Mention | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 153,942 |  |
Loans held for investment, net |  | 125,320 |
Venture Capital Loans | Pass | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 1,337,050 |
Loans held for investment, net | 1,494,720 |  |
Other Commercial | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 3,333,657 | 3,142,833 |
Loans held for investment, net | 3,340,400 | 3,153,084 |
Other Commercial | Classified | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 24,676 | 19,949 |
Other Commercial | Special Mention | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 25,489 |  |
Loans held for investment, net |  | 38,741 |
Other Commercial | Pass | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 3,094,394 |
Loans held for investment, net | 3,290,235 |  |
Asset Based | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 2,303,808 | 2,086,174 |
Loans held for investment, net | 2,305,325 | 2,087,969 |
Asset Based | Classified | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 3,640 | 5,003 |
Asset Based | Special Mention | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 37,746 |  |
Loans held for investment, net |  | 9,547 |
Asset Based | Pass | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 2,073,419 |
Loans held for investment, net | 2,263,939 |  |
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 733,684 | 799,131 |
Loans held for investment, net | 733,684 | 799,131 |
Commercial Real Estate Construction Loan Receivable | Classified | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 69,324 | 0 |
Commercial Real Estate Construction Loan Receivable | Special Mention | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 224,152 |  |
Loans held for investment, net |  | 148,024 |
Commercial Real Estate Construction Loan Receivable | Pass | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 651,107 |
Loans held for investment, net | 440,208 |  |
Residential Real Estate Construction Financing Receivable | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 2,127,354 | 2,373,162 |
Loans held for investment, net | 2,127,354 | 2,373,162 |
Residential Real Estate Construction Financing Receivable | Classified | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 3,120 | 0 |
Residential Real Estate Construction Financing Receivable | Special Mention | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 39,730 |  |
Loans held for investment, net |  | 203,220 |
Residential Real Estate Construction Financing Receivable | Pass | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 2,169,942 |
Loans held for investment, net | 2,084,504 |  |
Commercial | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 4,397,443 | 4,528,511 |
Loans held for investment, net | 4,489,543 | 4,578,772 |
Commercial | Classified | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 317,427 | 301,278 |
Commercial | Special Mention | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 300,298 |  |
Loans held for investment, net |  | 348,014 |
Commercial | Pass | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 3,929,480 |
Loans held for investment, net | 3,871,818 |  |
Multi-Family Real Estate Loans | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 6,192,555 | 6,009,507 |
Loans held for investment, net | 6,216,084 | 6,041,713 |
Multi-Family Real Estate Loans | Classified | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 216,093 | 113,164 |
Multi-Family Real Estate Loans | Special Mention | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 149,159 |  |
Loans held for investment, net |  | 202,690 |
Multi-Family Real Estate Loans | Pass | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 5,725,859 |
Loans held for investment, net | 5,850,832 |  |
Other Residential Real Estate | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 2,713,256 | 2,730,325 |
Loans held for investment, net | 2,787,031 | 2,807,174 |
Other Residential Real Estate | Classified | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 44,757 | 47,993 |
Other Residential Real Estate | Special Mention | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current | 1,260 |  |
Loans held for investment, net |  | 14,351 |
Other Residential Real Estate | Pass | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Current |  | 2,744,830 |
Loans held for investment, net | $ 2,741,014 |  |
Non Purchased Credit Impaired Loans and Leases |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net |  | $ 23,781,663 |

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