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Securities (Investments' Gross Unrealized Losses and Fair Value) (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
USD ($)
security
Sep. 30, 2015
USD ($)
Schedule of Investments [Line Items]    
Less than 12 Months, Fair Value $ 88,575 $ 57,665
Less than 12 Months, Unrealized Losses (345) (606)
12 Months or More, Fair Value 10,095 20,121
12 Months or More, Unrealized Losses (69) (563)
Total, Fair Value 98,670 77,786
Total, Unrealized Losses $ (414) (1,169)
Debt securities in unrealized loss position in the less than twelve months category | security 76  
Debt securities in unrealized loss position in the twelve months or more category | security 11  
Impairment of investments $ 0  
US Treasury Securities [Member]    
Schedule of Investments [Line Items]    
Less than 12 Months, Fair Value 2,004  
Less than 12 Months, Unrealized Losses (2)  
12 Months or More, Fair Value 0  
12 Months or More, Unrealized Losses 0  
Total, Fair Value 2,004  
Total, Unrealized Losses (2)  
U.S. Government Agencies [Member]    
Schedule of Investments [Line Items]    
Less than 12 Months, Fair Value   6,058
Less than 12 Months, Unrealized Losses   (71)
12 Months or More, Fair Value   2,109
12 Months or More, Unrealized Losses   (37)
Total, Fair Value   8,167
Total, Unrealized Losses   (108)
States and political subdivisions [Member]    
Schedule of Investments [Line Items]    
Less than 12 Months, Fair Value 33,918 9,086
Less than 12 Months, Unrealized Losses (170) (99)
12 Months or More, Fair Value 210 1,417
12 Months or More, Unrealized Losses (2) (13)
Total, Fair Value 34,128 10,503
Total, Unrealized Losses (172) (112)
Corporate obligations [Member]    
Schedule of Investments [Line Items]    
Less than 12 Months, Fair Value 3,312 2,221
Less than 12 Months, Unrealized Losses (17) (4)
12 Months or More, Fair Value 0 0
12 Months or More, Unrealized Losses 0 0
Total, Fair Value 3,312 2,221
Total, Unrealized Losses (17) (4)
Mortgage-backed securities-government sponsored entities [Member]    
Schedule of Investments [Line Items]    
Less than 12 Months, Fair Value 49,341 40,300
Less than 12 Months, Unrealized Losses (156) (432)
12 Months or More, Fair Value 9,885 16,595
12 Months or More, Unrealized Losses (67) (513)
Total, Fair Value 59,226 56,895
Total, Unrealized Losses $ (223) $ (945)