Securities (Securities held to maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value
Less than 12 months	$ 29,174	$ 8,512
12 months or longer	13,160	8,989
Total	42,334	17,501
Unrealized Losses
Less than 12 months	(209)	(49)
12 months or longer	(727)	(467)
Total	(936)	(516)
Obligations of states and political subdivisions
Fair Value
Less than 12 months	29,174	8,512
12 months or longer	13,160	8,989
Total	42,334	17,501
Unrealized Losses
Less than 12 months	(209)	(49)
12 months or longer	(727)	(467)
Total	$ (936)	$ (516)

Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for 12 months or longer.

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), in unrealized loss position.

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity), in continuous loss position for less than 12 months.

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