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Loans and Leases - Nonaccrual and Performing Loans and Leases Held for Investment (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
--- | --- | --- | ---
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | $ 145,785 | $ 62,527 | $ 87,124
Loans held for investment, net | 25,473,022 | 25,489,687 | 25,672,381
Real Estate Mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 129,234 | 47,730 | 83,056
Loans held for investment, net | 15,967,399 | 16,111,985 | 15,407,611
Real Estate Construction and Land |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 0 | 0 | 0
Loans held for investment, net | 3,245,354 | 3,159,269 | 4,608,440
Commercial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 15,715 | 13,986 | 3,543
Loans held for investment, net | 5,820,567 | 5,765,307 | 5,229,107
Consumer |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 836 | 811 | 525
Loans held for investment, net | 439,702 | 453,126 | $ 427,223
Performing |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 25,327,237 | 25,427,160 |
Performing | Real Estate Mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 15,838,165 | 16,064,255 |
Performing | Real Estate Construction and Land |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 3,245,354 | 3,159,269 |
Performing | Commercial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 5,804,852 | 5,751,321 |
Performing | Consumer |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 438,866 | 452,315 |
Venture Capital Loans | Commercial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 0 | 325 |
Loans held for investment, net | 1,513,641 | 1,446,362 |
Venture Capital Loans | Performing | Commercial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 1,513,641 | 1,446,037 |
Other Commercial | Commercial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 13,390 | 10,972 |
Loans held for investment, net | 2,245,910 | 2,129,860 |
Other Commercial | Performing | Commercial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 2,232,520 | 2,118,888 |
Asset Based [Member] | Commercial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 2,325 | 2,689 |
Loans held for investment, net | 2,061,016 | 2,189,085 |
Asset Based [Member] | Performing | Commercial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 2,058,691 | 2,186,396 |
Commercial Real Estate Construction Loan Receivable | Real Estate Construction and Land |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 0 | 0 |
Loans held for investment, net | 775,021 | 759,585 |
Commercial Real Estate Construction Loan Receivable | Performing | Real Estate Construction and Land |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 775,021 | 759,585 |
Residential Real Estate Construction Financing Receivable | Real Estate Construction and Land |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 0 | 0 |
Loans held for investment, net | 2,470,333 | 2,399,684 |
Residential Real Estate Construction Financing Receivable | Performing | Real Estate Construction and Land |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 2,470,333 | 2,399,684 |
Commercial | Real Estate Mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 66,527 | 15,669 |
Loans held for investment, net | 4,896,544 | 5,026,497 |
Commercial | Performing | Real Estate Mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 4,830,017 | 5,010,828 |
Multi-Family Real Estate Loans | Real Estate Mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 953 | 1,020 |
Loans held for investment, net | 6,121,472 | 6,025,179 |
Multi-Family Real Estate Loans | Performing | Real Estate Mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | 6,120,519 | 6,024,159 |
Other Residential Real Estate | Real Estate Mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Nonaccrual | 61,754 | 31,041 |
Loans held for investment, net | 4,949,383 | 5,060,309 |
Other Residential Real Estate | Performing | Real Estate Mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Loans held for investment, net | $ 4,887,629 | $ 5,029,268 |

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