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Investment Securities (Details 1) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Information concerning investments with unrealized losses    
Less than 12 months, Fair Value $ 86,369 $ 83,997
Less than 12 months, Unrealized Losses (1,618) (1,797)
12 months or longer, Fair Value 9,244 8,338
12 months or longer, Unrealized Losses (296) (299)
Total, Fair Value 95,613 92,335
Total, Unrealized Losses (1,914) (2,096)
U.S. Agency [Member]    
Information concerning investments with unrealized losses    
Less than 12 months, Fair Value 1,391 398
Less than 12 months, Unrealized Losses (6) (2)
12 months or longer, Fair Value 0 0
12 months or longer, Unrealized Losses 0 0
Total, Fair Value 1,391 398
Total, Unrealized Losses (6) (2)
U.S. Agency mortgage-backed securities [Member]    
Information concerning investments with unrealized losses    
Less than 12 months, Fair Value 52,169 49,918
Less than 12 months, Unrealized Losses (645) (703)
12 months or longer, Fair Value 1,478 1,576
12 months or longer, Unrealized Losses (63) (62)
Total, Fair Value 53,647 51,494
Total, Unrealized Losses (708) (765)
Taxable Municipal [Member]    
Information concerning investments with unrealized losses    
Less than 12 months, Fair Value 14,830 13,301
Less than 12 months, Unrealized Losses (517) (522)
12 months or longer, Fair Value 0 0
12 months or longer, Unrealized Losses 0 0
Total, Fair Value 14,830 13,301
Total, Unrealized Losses (517) (522)
Corporate bonds and other securities [Member]    
Information concerning investments with unrealized losses    
Less than 12 months, Fair Value 17,979 20,380
Less than 12 months, Unrealized Losses (450) (570)
12 months or longer, Fair Value 7,766 6,762
12 months or longer, Unrealized Losses (233) (237)
Total, Fair Value 25,745 27,142
Total, Unrealized Losses $ (683) $ (807)