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Securities (Unrealized Losses Held-to-Maturity) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Fair Value    
Less than 12 months $ 9,497 $ 22,134
12 months or longer 5,056 0
Total 14,553 22,134
Unrealized Losses    
Less than 12 months 95 179
12 months or longer 46 0
Total 141 179
U.S. Government agency obligations - government-sponsored enterprises    
Fair Value    
Less than 12 months 1,000 1,000
12 months or longer 0 0
Total 1,000 1,000
Unrealized Losses    
Less than 12 months 3 5
12 months or longer 0 0
Total 3 5
Municipal obligations    
Fair Value    
Less than 12 months 2,615 9,472
12 months or longer 0 0
Total 2,615 9,472
Unrealized Losses    
Less than 12 months 37 78
12 months or longer 0 0
Total 37 78
Collateralized mortgage obligations - government issued    
Fair Value    
Less than 12 months 3,537 6,980
12 months or longer 852 0
Total 4,389 6,980
Unrealized Losses    
Less than 12 months 20 38
12 months or longer 14 0
Total 34 38
Collateralized mortgage obligations - government-sponsored enterprises    
Fair Value    
Less than 12 months 2,345 4,682
12 months or longer 4,204 0
Total 6,549 4,682
Unrealized Losses    
Less than 12 months 35 58
12 months or longer 32 0
Total $ 67 $ 58