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Loans Receivable and Allowance for Loan Losses (Summary of Amount of Loans in Each Category that were Individually and Collectively Evaluated for Impairment) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment $ 451 $ 1,319
Loans acquired with deteriorated credit quality 829 886
Collectively evaluated for impairment 863,034 848,097
Total Loans 864,314 850,302
Residential Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 0 0
Loans acquired with deteriorated credit quality 581 630
Collectively evaluated for impairment 231,373 234,893
Total Loans 231,954 235,523
Commercial Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 451 1,319
Loans acquired with deteriorated credit quality 248 256
Collectively evaluated for impairment 372,577 373,215
Total Loans 373,276 374,790
Construction Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 0 0
Loans acquired with deteriorated credit quality 0 0
Collectively evaluated for impairment 18,604 17,445
Total Loans 18,604 17,445
Commercial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 0 0
Loans acquired with deteriorated credit quality 0 0
Collectively evaluated for impairment 118,535 110,542
Total Loans 118,535 110,542
Consumer Loans To Individuals [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Individually evaluated for impairment 0 0
Loans acquired with deteriorated credit quality 0 0
Collectively evaluated for impairment 121,945 112,002
Total Loans $ 121,945 $ 112,002