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Postretirement Benefit Plans (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]    
Postretirement benefit health insurance reimbursable premimum, maximum $ 5,000  
Defined Benefit Postretirement Life Insurance [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Minimum Service Period Requirement 20 years  
Defined Benefit Plan, Benefit Description, Prior To Age 65 be three times the participant's annual salary at retirement or $50,000, whichever is less  
Defined Benefit Plan, Benefit Description, After Age 65 life insurance coverage amount will decrease by 10% per year, subject to a minimum amount of $5,000  
Prior to age 65, life insurance maximum, coverage amount $ 50,000  
Life insurance minimum amount coverage 5,000  
Defined Benefit Postretirement Health And Life Coverage [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Accumulated Benefit Obligation 572,000 $ 861,000
Director's Retirement Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Unrecognized Prior Service Cost Generated By Adoption of the Plan 274,000  
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Prior Service Cost, before Tax 64,000  
Defined Benefit Plan, Accumulated Benefit Obligation 1,150,000 1,186,000
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year 21,525  
Cash surrender value of bank owned life insurance $ 3,764,000 $ 3,689,000