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FAIR VALUE MEASUREMENTS AFS (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Available for Sale: |  |
Amortized Cost | $ 172,991 | $ 165,278
Fair Value | 171,596 | 164,183
Unrealized Gains | 16 | 15
Unrealized Losses | (1,411) | (1,110)
Municipal bonds |  |
Available for Sale: |  |
Amortized Cost | 32,411 | 16,046
Fair Value | 31,484 | 15,206
Unrealized Losses | (927) | (840)
Variable rate demand notes |  |
Available for Sale: |  |
Amortized Cost |  | 19,700
Fair Value |  | 19,700
Corporate bonds |  |
Available for Sale: |  |
Amortized Cost | 134,143 | 122,568
Fair Value | 133,684 | 122,298
Unrealized Losses | (459) | (270)
Government securities |  |
Available for Sale: |  |
Amortized Cost | 1,192 | 2,411
Fair Value | 1,208 | 2,426
Unrealized Gains | 16 | 15
Certificates of deposit |  |
Available for Sale: |  |
Amortized Cost | 5,245 | 4,553
Fair Value | 5,220 | $ 4,553
Unrealized Losses | $ (25) |

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