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Loans Receivable and Allowance for Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Financing Receivable, Impaired [Line Items] |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment |  | $ 143
Impaired Financing Receivable, with Related Allowance, Recorded Investment |  | 2,001
Impaired Financing Receivable, Recorded Investment |  | 2,144
Unpaid Principal Balance, With no related allowance recorded |  | 394
Unpaid Principal Balance, With an allowance recorded |  | 2,001
Unpaid Principal Balance, Total |  | 2,395
Associated Allowance |  | 417
Average Recorded Investment, Total | $ 2,121 | 1,036
Interest Income Recognized, Total | 14 | 233
Impaired Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,662 |
Impaired Financing Receivable, Recorded Investment | 2,662 | 2,144
Unpaid Principal Balance, With no related allowance recorded | 3,314 |
Unpaid Principal Balance, Total | 3,314 |
Commercial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Average Recorded Investment, Total | 16 |
Commercial [Member] | Impaired Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 2,582 |
Impaired Financing Receivable, Recorded Investment | 2,582 |
Unpaid Principal Balance, With no related allowance recorded | 3,234 |
Unpaid Principal Balance, Total | 3,234 |
Commercial Real Estate Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment |  | 143
Impaired Financing Receivable, with Related Allowance, Recorded Investment |  | 2,001
Impaired Financing Receivable, Recorded Investment |  | 2,144
Unpaid Principal Balance, With no related allowance recorded |  | 394
Unpaid Principal Balance, With an allowance recorded |  | 2,001
Unpaid Principal Balance, Total |  | 2,395
Associated Allowance |  | 417
Average Recorded Investment, Total | 2,105 | 1,036
Interest Income Recognized, Total | 14 | $ 233
Commercial Real Estate Loans [Member] | Impaired Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 80 |
Impaired Financing Receivable, Recorded Investment | 80 |
Unpaid Principal Balance, With no related allowance recorded | 80 |
Unpaid Principal Balance, Total | $ 80 |

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