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Loans Receivable and Allowance for Loan Losses (Delinquency Status of Total Loans) (Details) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | $ 2,343,937,000 | $ 2,330,018,000
Loans Receivable >90 Days and Accruing |  | 3,124,000 | 333,000
Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 20,806,000 | 30,879,000
30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 5,738,000 | 20,847,000
60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 166,000 | 4,178,000
Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 14,902,000 | 5,854,000
Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 2,323,131,000 | 2,299,139,000
Originated loans [Member] | Residential [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 224,534,000 | 244,369,000
Loans Receivable >90 Days and Accruing |  |  | 125,000
Originated loans [Member] | Residential [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 1,149,000 | 1,437,000
Originated loans [Member] | Residential [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 1,063,000 | 507,000
Originated loans [Member] | Residential [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  |  | 266,000
Originated loans [Member] | Residential [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 86,000 | 664,000
Originated loans [Member] | Residential [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 223,385,000 | 242,932,000
Originated loans [Member] | Commercial & Multi-family [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 1,720,174,000 | 1,690,836,000
Originated loans [Member] | Commercial & Multi-family [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 6,348,000 | 20,240,000
Originated loans [Member] | Commercial & Multi-family [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 1,181,000 | 15,910,000
Originated loans [Member] | Commercial & Multi-family [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  |  | 2,996,000
Originated loans [Member] | Commercial & Multi-family [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 5,167,000 | 1,334,000
Originated loans [Member] | Commercial & Multi-family [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 1,713,826,000 | 1,670,596,000
Originated loans [Member] | Construction Loans In Process [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 153,904,000 | 155,967,000
Originated loans [Member] | Construction Loans In Process [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 5,746,000 |
Originated loans [Member] | Construction Loans In Process [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 2,899,000 |
Originated loans [Member] | Construction Loans In Process [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 2,847,000 |
Originated loans [Member] | Construction Loans In Process [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 148,158,000 | 155,967,000
Originated loans [Member] | Commercial Business [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [1] | 191,139,000 | 184,357,000
Loans Receivable >90 Days and Accruing | [1] | 3,124,000 | 133,000
Originated loans [Member] | Commercial Business [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [1] | 7,346,000 | 8,147,000
Originated loans [Member] | Commercial Business [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [1] | 405,000 | 3,889,000
Originated loans [Member] | Commercial Business [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [1] | 166,000 | 904,000
Originated loans [Member] | Commercial Business [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [1] | 6,775,000 | 3,354,000
Originated loans [Member] | Commercial Business [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [1] | 183,793,000 | 176,210,000
Originated loans [Member] | Home Equity [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [2] | 50,469,000 | 53,667,000
Loans Receivable >90 Days and Accruing | [2] |  | 75,000
Originated loans [Member] | Home Equity [Member] | Total Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [2] | 217,000 | 1,055,000
Originated loans [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [2] | 190,000 | 541,000
Originated loans [Member] | Home Equity [Member] | 60 to 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [2] |  | 12,000
Originated loans [Member] | Home Equity [Member] | Greater than 90 Days Past Due [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [2] | 27,000 | 502,000
Originated loans [Member] | Home Equity [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable | [2] | 50,252,000 | 52,612,000
Originated loans [Member] | Consumer [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | 3,717,000 | 822,000
Originated loans [Member] | Consumer [Member] | Current [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Total Loans Receivable |  | $ 3,717,000 | $ 822,000
[1] | Includes business lines of credit.
[2] | Includes home equity lines of credit.

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