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Securities (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Summary of amortized cost and approximate fair values of securities    
Amortized Cost $ 93,730 $ 83,848
Gross Unrealized Gains 1,887 1,681
Gross Unrealized Losses (135) (289)
Securities available for sale, at fair value 95,482 85,240
U.S. Treasury and Government Agencies [Member]    
Summary of amortized cost and approximate fair values of securities    
Amortized Cost 11,150 15,187
Gross Unrealized Gains $ 157 124
Gross Unrealized Losses (4)
Securities available for sale, at fair value $ 11,307 15,307
Mortgage-backed securities [Member]    
Summary of amortized cost and approximate fair values of securities    
Amortized Cost 65,003 50,563
Gross Unrealized Gains 773 462
Gross Unrealized Losses (135) (285)
Securities available for sale, at fair value 65,641 50,740
State and political subdivisions [Member]    
Summary of amortized cost and approximate fair values of securities    
Amortized Cost 17,554 18,075
Gross Unrealized Gains $ 957 $ 1,095
Gross Unrealized Losses
Securities available for sale, at fair value $ 18,511 $ 19,170
Equity securities [Member]    
Summary of amortized cost and approximate fair values of securities    
Amortized Cost $ 23 $ 23
Gross Unrealized Gains
Gross Unrealized Losses
Securities available for sale, at fair value $ 23 $ 23