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Loans Receivable - Summary of Performance and Credit Quality of Loan Portfolio (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Current | $ 1,769,533 | $ 1,794,582
Total Loans Receivable | 1,796,142 | 1,821,274
Loans receivable more than 90 days and accruing | 0 | 32
Commercial real estate [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Current | 1,329,908 | 1,359,644
Total Loans Receivable | 1,353,039 | 1,385,085
Loans receivable more than 90 days and accruing | 0 | 0
Commercial and industrial [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Current | 79,821 | 92,400
Total Loans Receivable | 81,370 | 92,857
Loans receivable more than 90 days and accruing | 0 | 32
Construction [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Current | 203,004 | 257,169
Total Loans Receivable | 203,004 | 257,169
Loans receivable more than 90 days and accruing | 0 | 0
Residential first-lien mortgage [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Current | 134,001 | 67,236
Total Loans Receivable | 135,930 | 68,030
Loans receivable more than 90 days and accruing | 0 | 0
Home equity/consumer [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Current | 22,799 | 18,133
Total Loans Receivable | 22,799 | 18,133
Loans receivable more than 90 days and accruing | 0 | 0
30 to 59 Days Past Due [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 7,979 | 736
30 to 59 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 6,026 | 0
30 to 59 Days Past Due [Member] | Commercial and industrial [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 248 | 36
30 to 59 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 0 | 0
30 to 59 Days Past Due [Member] | Residential first-lien mortgage [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 1,705 | 700
30 to 59 Days Past Due [Member] | Home equity/consumer [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 0 | 0
60 to 89 Days Past Due [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 1,920 | 94
60 to 89 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 1,820 | 0
60 to 89 Days Past Due [Member] | Commercial and industrial [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 16 | 0
60 to 89 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 0 | 0
60 to 89 Days Past Due [Member] | Residential first-lien mortgage [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 84 | 94
60 to 89 Days Past Due [Member] | Home equity/consumer [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 0 | 0
Greater than 90 Days [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 16,710 | 25,862
Greater than 90 Days [Member] | Commercial real estate [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 15,285 | 25,441
Greater than 90 Days [Member] | Commercial and industrial [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 1,285 | 421
Greater than 90 Days [Member] | Construction [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 0 | 0
Greater than 90 Days [Member] | Residential first-lien mortgage [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 140 | 0
Greater than 90 Days [Member] | Home equity/consumer [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 0 | 0
Past Due [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 26,609 | 26,692
Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 23,131 | 25,441
Past Due [Member] | Commercial and industrial [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 1,549 | 457
Past Due [Member] | Construction [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 0 | 0
Past Due [Member] | Residential first-lien mortgage [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | 1,929 | 794
Past Due [Member] | Home equity/consumer [Member] |  |
Financing Receivable Performance and Credit Quality Indicators [Line Items] |  |
Total | $ 0 | $ 0

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