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Securities (Unrealized Losses Held-to-Maturity) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Fair Value |  |
Less than 12 months | $ 22,201 | $ 7,591
12 months or longer | 10,905 | 11,962
Total | 33,106 | 19,553
Unrealized Losses |  |
Less than 12 months | 314 | 78
12 months or longer | 342 | 181
Total | 656 | 259
U.S. government agency obligations - government-sponsored enterprises |  |
Fair Value |  |
Less than 12 months | 0 | 0
12 months or longer | 1,499 | 1,499
Total | 1,499 | 1,499
Unrealized Losses |  |
Less than 12 months | 0 | 0
12 months or longer | 5 | 9
Total | 5 | 9
Municipal obligations |  |
Fair Value |  |
Less than 12 months | 13,308 | 3,723
12 months or longer | 258 | 259
Total | 13,566 | 3,982
Unrealized Losses |  |
Less than 12 months | 109 | 27
12 months or longer | 8 | 7
Total | 117 | 34
Collateralized mortgage obligations - government issued |  |
Fair Value |  |
Less than 12 months | 4,036 | 3,868
12 months or longer | 4,137 | 4,677
Total | 8,173 | 8,545
Unrealized Losses |  |
Less than 12 months | 131 | 51
12 months or longer | 146 | 79
Total | 277 | 130
Collateralized mortgage obligations - government-sponsored enterprises |  |
Fair Value |  |
Less than 12 months | 4,857 | 0
12 months or longer | 5,011 | 5,527
Total | 9,868 | 5,527
Unrealized Losses |  |
Less than 12 months | 74 | 0
12 months or longer | 183 | 86
Total | $ 257 | $ 86

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