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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Loans and Leases Receivable (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans receivable, mortgage warehouse, at fair value | $ 897,912 | $ 1,323,312 |  |
Loans receivable, PPP | 74,735 | 998,153 |  |
Loans and leases receivable | 11,889,120 | 13,144,894 |  |
Allowance for credit losses on loans and leases | (135,311) | (130,924) | $ (137,804) | $ (144,176)
Total loans and leases receivable, net of allowance for credit losses on loans and leases | 12,726,456 | 15,335,435 |  |
Deferred (fees) costs and unamortized (discounts) premiums, net | (22,700) | (21,500) |  |
Multifamily |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 2,138,622 | 2,213,019 |  |
Allowance for credit losses on loans and leases | (16,343) | (14,541) | (4,477) | (12,620)
Commercial real estate owner occupied |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 797,319 | 885,339 |  |
Allowance for credit losses on loans and leases | (9,882) | (6,454) | (3,213) | (9,512)
Commercial real estate non-owner occupied |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 1,177,650 | 1,290,730 |  |
Allowance for credit losses on loans and leases | (16,859) | (11,219) | (6,210) | (19,452)
Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 166,393 | 162,009 |  |
Allowance for credit losses on loans and leases | (1,482) | (1,913) | (692) | (5,871)
Residential real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 484,435 | 497,952 |  |
Allowance for credit losses on loans and leases | (6,586) | (6,094) | (2,383) | (3,977)
Manufactured housing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 38,670 | 45,076 |  |
Allowance for credit losses on loans and leases | (4,239) | (4,430) | $ (4,278) | $ (5,190)
Commercial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 10,491,089 | 11,223,927 |  |
Commercial | Specialty lending |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 5,006,693 | 5,412,887 |  |
Commercial | Other commercial and industrial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 1,204,412 | 1,259,943 |  |
Commercial | Multifamily |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 2,138,622 | 2,213,019 |  |
Commercial | Commercial real estate owner occupied |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 797,319 | 885,339 |  |
Commercial | Commercial real estate non-owner occupied |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 1,177,650 | 1,290,730 |  |
Commercial | Construction |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 166,393 | 162,009 |  |
Commercial | Direct finance equipment leases |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 205,700 | 157,400 |  |
Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 1,398,031 | 1,920,967 |  |
Consumer | Residential real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 484,435 | 497,952 |  |
Consumer | Manufactured housing |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 38,670 | 45,076 |  |
Consumer | Personal installment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | 555,533 | 964,641 |  |
Consumer | Other installment |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans and leases receivable | $ 319,393 | $ 413,298 |  |

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- Definition Loans receivable mortgage warehouse, carrying amount of loans made to mortgage companies under master lending agreements, usually in the form of a revolving line of credit used by the borrower to originate and purchase and sell mortgage loans. + References No definition available. + Details
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