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Loans Receivable, Net - Narrative (Details) - USD ($) | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans with modifications to borrowers experiencing financial difficulty | $ 31,600,000 |  | $ 31,600,000 |  | $ 30,900,000
Outstanding commitments to lend to borrowers with loan modifications | 0 |  | 0 |  | 0
Loans to borrowers experiencing financial difficulty that had payment default |  |  | 16,930,000 | $ 22,863,000 |
90 Days or Greater Past Due |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans to borrowers experiencing financial difficulty that had payment default | 0 | $ 0 |  |  |
Paycheck Protection Program |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Commitments to lend additional funds to borrowers | 0 |  | 0 |  | 0
Commercial real estate – investor |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Recorded investment in mortgage and consumer loans collateralized, foreclosure amount | 18,600,000 |  | 18,600,000 |  | 11,800,000
Loans to borrowers experiencing financial difficulty that had payment default |  |  | 16,684,000 | 19,645,000 |
Commercial and industrial: | Commercial and Industrial - Real Estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Recorded investment in mortgage and consumer loans collateralized, foreclosure amount | 7,200,000 |  | 7,200,000 |  | 4,800,000
Loans to borrowers experiencing financial difficulty that had payment default |  |  |  | 2,896,000 |
Commercial and industrial: | Commercial and industrial - non-real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Recorded investment in mortgage and consumer loans collateralized, foreclosure amount | 326,000 |  | 326,000 |  | 32,000
Residential Real Estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Recorded investment in mortgage and consumer loans collateralized, foreclosure amount | $ 5,300,000 |  | 5,300,000 |  | $ 8,600,000
Loans to borrowers experiencing financial difficulty that had payment default |  |  | $ 246,000 | $ 128,000 |

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- Definition Financing Receivable, Excluding Accrued Interest, Modified In Period Including Paydowns, Amount + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 40 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481628/310-20-40-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 + Details
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