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Allowance for Loan Losses (Details 3) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Average loan balance:        
Average investment in impaired loans $ 1,372 $ 1,729 $ 1,626 $ 2,001
Interest income recognized:        
Interest income recognized on a cash basis on impaired loans 7 15 16 22
Commercial [Member]        
Average loan balance:        
Average investment in impaired loans 1,020 200 1,103 110
Interest income recognized:        
Interest income recognized on a cash basis on impaired loans 4 10 8 11
Commercial loans secured by real estate [Member]        
Average loan balance:        
Average investment in impaired loans 352 1,509 523 1,891
Interest income recognized:        
Interest income recognized on a cash basis on impaired loans $ 3 $ 5 $ 8 $ 11