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Loans Receivables and Allowance for Credit Losses - Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Jan. 01, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Allowance for credit loss | $ 15,925 | $ 10,310 | $ 10,310 | $ 9,905 | $ 10,584
Business Activities Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Individually evaluated for impairment | 4,205 |  | 6,043 |  |
Allowance for credit losses, collectively evaluated for impairment | 11,720 |  | 4,267 |  |
Allowance for credit loss | 15,925 |  | 10,310 |  |
Individually evaluated for impairment | 17,133 |  | 18,916 |  |
Collectively evaluated for impairment, amount | 831,726 |  | 829,400 |  |
Loans receivable, gross | 848,859 |  | 848,316 |  |
Commercial Real Estate |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Allowance for credit loss | 6,089 | 6,966 | 6,966 | 5,063 | 4,485
Commercial Real Estate | Business Activities Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Individually evaluated for impairment | 3,813 |  | 5,430 |  |
Allowance for credit losses, collectively evaluated for impairment | 2,276 |  | 1,536 |  |
Allowance for credit loss | 6,089 |  | 6,966 |  |
Individually evaluated for impairment | 12,775 |  | 11,241 |  |
Collectively evaluated for impairment, amount | 459,318 |  | 426,202 |  |
Loans receivable, gross | 472,093 |  | 437,443 |  |
Residential Real Estate |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Allowance for credit loss | 607 | 665 | 665 | 1,700 | 1,379
Residential Real Estate | Business Activities Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Individually evaluated for impairment | 0 |  | 5 |  |
Allowance for credit losses, collectively evaluated for impairment | 607 |  | 660 |  |
Allowance for credit loss | 607 |  | 665 |  |
Individually evaluated for impairment | 0 |  | 2,508 |  |
Collectively evaluated for impairment, amount | 106,783 |  | 121,632 |  |
Loans receivable, gross | 106,783 |  | 124,140 |  |
Commercial and Industrial |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Allowance for credit loss | 1,269 | 1,403 | 1,403 | 2,532 | 3,284
Commercial and Industrial | Business Activities Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Individually evaluated for impairment | 392 |  | 608 |  |
Allowance for credit losses, collectively evaluated for impairment | 877 |  | 795 |  |
Allowance for credit loss | 1,269 |  | 1,403 |  |
Individually evaluated for impairment | 3,904 |  | 4,653 |  |
Collectively evaluated for impairment, amount | 159,661 |  | 134,134 |  |
Loans receivable, gross | 163,565 |  | 138,787 |  |
Consumer and Other |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Allowance for credit loss | 7,843 | 1,207 | 1,207 | 253 | 295
Consumer and Other | Business Activities Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |
Allowance for credit losses, collectively evaluated for impairment | 7,843 |  | 1,207 |  |
Allowance for credit loss | 7,843 |  | 1,207 |  |
Individually evaluated for impairment | 0 |  | 514 |  |
Collectively evaluated for impairment, amount | 99,688 |  | 140,577 |  |
Loans receivable, gross | 99,688 |  | 141,091 |  |
Construction |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Allowance for credit loss | 4 | 24 | 24 | 78 | 739
Construction | Business Activities Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |
Allowance for credit losses, collectively evaluated for impairment | 4 |  | 24 |  |
Allowance for credit loss | 4 |  | 24 |  |
Individually evaluated for impairment | 454 |  | 0 |  |
Collectively evaluated for impairment, amount | 3,812 |  | 4,922 |  |
Loans receivable, gross | 4,266 |  | 4,922 |  |
Construction to Permanent - CRE |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Allowance for credit loss | 113 | $ 10 | 10 | 41 | 162
Construction to Permanent - CRE | Business Activities Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |
Allowance for credit losses, collectively evaluated for impairment | 113 |  | 10 |  |
Allowance for credit loss | 113 |  | 10 |  |
Individually evaluated for impairment | 0 |  | 0 |  |
Collectively evaluated for impairment, amount | 2,464 |  | 1,933 |  |
Loans receivable, gross | 2,464 |  | 1,933 |  |
Unallocated |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Allowance for credit loss | 0 |  | 35 | $ 238 | $ 240
Unallocated | Business Activities Loans |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |
Allowance for credit losses, collectively evaluated for impairment | 0 |  | 35 |  |
Allowance for credit loss | 0 |  | 35 |  |
Individually evaluated for impairment | 0 |  | 0 |  |
Collectively evaluated for impairment, amount | 0 |  | 0 |  |
Loans receivable, gross | $ 0 |  | $ 0 |  |

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 + Details
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