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Loans and Leases - Credit Risk Rating Categories for Loans and Leases Held for Investment (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023
--- | --- | --- | ---
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | $ 23,228,909 | $ 25,489,687 | $ 22,258,210
Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 13,573,600 | 16,111,985 | 14,288,042
Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 3,357,597 | 3,159,269 | 2,465,523
Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 5,871,809 | 5,765,307 | 5,094,786
Consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 425,903 | 453,126 | $ 409,859
Classified |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 415,498 | 228,417 |
Classified | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 355,085 | 188,848 |
Classified | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 0 | 0 |
Classified | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 59,523 | 38,410 |
Classified | Consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 890 | 1,159 |
Special Mention |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 680,663 | 513,312 |
Special Mention | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 350,052 | 382,240 |
Special Mention | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 110,774 | 2,757 |
Special Mention | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 212,729 | 121,123 |
Special Mention | Consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 7,108 | 7,192 |
Pass |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 22,132,748 | 24,747,958 |
Pass | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 12,868,463 | 15,540,897 |
Pass | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 3,246,823 | 3,156,512 |
Pass | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 5,599,557 | 5,605,774 |
Pass | Consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 417,905 | 444,775 |
Venture Capital Loans | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 1,456,122 | 1,446,362 |
Venture Capital Loans | Classified | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 20,278 | 7,805 |
Venture Capital Loans | Special Mention | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 189,016 | 98,633 |
Venture Capital Loans | Pass | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 1,246,828 | 1,339,924 |
Other Commercial | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 2,446,974 | 2,129,860 |
Other Commercial | Classified | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 25,601 | 26,044 |
Other Commercial | Special Mention | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 14,684 | 9,984 |
Other Commercial | Pass | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 2,406,689 | 2,093,832 |
Asset Based [Member] | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 1,968,713 | 2,189,085 |
Asset Based [Member] | Classified | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 13,644 | 4,561 |
Asset Based [Member] | Special Mention | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 9,029 | 12,506 |
Asset Based [Member] | Pass | Commercial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 1,946,040 | 2,172,018 |
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 784,166 | 759,585 |
Commercial Real Estate Construction Loan Receivable | Classified | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 0 | 0 |
Commercial Real Estate Construction Loan Receivable | Special Mention | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 107,424 | 0 |
Commercial Real Estate Construction Loan Receivable | Pass | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 676,742 | 759,585 |
Residential Real Estate Construction Financing Receivable | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 2,573,431 | 2,399,684 |
Residential Real Estate Construction Financing Receivable | Classified | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 0 | 0 |
Residential Real Estate Construction Financing Receivable | Special Mention | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 3,350 | 2,757 |
Residential Real Estate Construction Financing Receivable | Pass | Real Estate Construction and Land |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 2,570,081 | 2,396,927 |
Commercial | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 4,722,585 | 5,026,497 |
Commercial | Classified | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 188,537 | 75,739 |
Commercial | Special Mention | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 273,747 | 219,687 |
Commercial | Pass | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 4,260,301 | 4,731,071 |
Multi-Family Real Estate Loans | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 5,984,930 | 6,025,179 |
Multi-Family Real Estate Loans | Classified | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 114,583 | 74,954 |
Multi-Family Real Estate Loans | Special Mention | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 54,893 | 108,356 |
Multi-Family Real Estate Loans | Pass | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 5,815,454 | 5,841,869 |
Other Residential Real Estate | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 2,866,085 | 5,060,309 |
Other Residential Real Estate | Classified | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 51,965 | 38,155 |
Other Residential Real Estate | Special Mention | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | 21,412 | 54,197 |
Other Residential Real Estate | Pass | Real Estate Mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net | $ 2,792,708 | 4,967,957 |
Non Purchased Credit Impaired Loans and Leases |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans held for investment, net |  | $ 25,489,687 |

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