Securities (Unrealized Losses Available-for-Sale) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Fair value    
Less than 12 months $ 74,593 $ 70,573
12 months or longer 3,799 9,385
Total 78,392 79,958
Unrealized losses    
Less than 12 months 1,160 470
12 months or longer 92 159
Total 1,252 629
U.S. Government agency obligations - government-sponsored enterprises    
Fair value    
Less than 12 months 1,991 3,536
12 months or longer 0 1,981
Total 1,991 5,517
Unrealized losses    
Less than 12 months 10 13
12 months or longer 0 19
Total 10 32
Municipal obligations    
Fair value    
Less than 12 months 7,207 2,403
12 months or longer 406 0
Total 7,613 2,403
Unrealized losses    
Less than 12 months 89 7
12 months or longer 3 0
Total 92 7
Asset-backed securities    
Fair value    
Less than 12 months 0 1,269
12 months or longer 1,081 0
Total 1,081 1,269
Unrealized losses    
Less than 12 months 0 58
12 months or longer 35 0
Total 35 58
Collateralized mortgage obligations - government issued    
Fair value    
Less than 12 months 10,552 3,373
12 months or longer 493 5,687
Total 11,045 9,060
Unrealized losses    
Less than 12 months 130 19
12 months or longer 16 97
Total 146 116
Collateralized mortgage obligations - government-sponsored enterprises    
Fair value    
Less than 12 months 54,843 59,992
12 months or longer 1,819 1,717
Total 56,662 61,709
Unrealized losses    
Less than 12 months 931 373
12 months or longer 38 43
Total $ 969 $ 416