Loans Receivable and Allowance for Loan Losses (Loan Portfolio Summarized by the Past Due Status) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Current	$ 923,371	$ 919,381
Non-Accrual	2,743	795
Total Past Due and Non-Accrual	5,226	5,295
Total Loans	928,597	924,676
Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	1,975	1,218
Financing Receivables, 61 to 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	508	3,282
Financing Receivables, Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Residential Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	225,840	228,242
Non-Accrual	479	567
Total Past Due and Non-Accrual	1,533	1,539
Total Loans	227,373	229,781
Residential Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	849	727
Residential Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	205	245
Residential Real Estate Loans [Member] | Financing Receivables, Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Commercial Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	395,516	388,117
Non-Accrual	2,043	99
Total Past Due and Non-Accrual	2,976	3,210
Total Loans	398,492	391,327
Commercial Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	784	176
Commercial Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	149	2,935
Commercial Real Estate Loans [Member] | Financing Receivables, Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Construction Real Estate Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	16,622	17,695
Non-Accrual	0	0
Total Past Due and Non-Accrual	0	37
Total Loans	16,622	17,732
Construction Real Estate Loans [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Construction Real Estate Loans [Member] | Financing Receivables, 61 to 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	0	37
Construction Real Estate Loans [Member] | Financing Receivables, Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Commercial [Member]
Financing Receivable, Past Due [Line Items]
Current	132,623	134,018
Non-Accrual	53	50
Total Past Due and Non-Accrual	93	132
Total Loans	132,716	134,150
Commercial [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	0	82
Commercial [Member] | Financing Receivables, 61 to 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	40	0
Commercial [Member] | Financing Receivables, Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	0	0
Consumer Loans To Individuals [Member]
Financing Receivable, Past Due [Line Items]
Current	152,770	151,309
Non-Accrual	168	79
Total Past Due and Non-Accrual	624	377
Total Loans	153,394	151,686
Consumer Loans To Individuals [Member] | Financing Receivables, 31 to 60 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	342	233
Consumer Loans To Individuals [Member] | Financing Receivables, 61 to 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	114	65
Consumer Loans To Individuals [Member] | Financing Receivables, Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Past Due	$ 0	$ 0