Securities Available-for-Sale (Details) $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($) Integer	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) Integer
Investments, Debt and Equity Securities [Abstract]
Number of Investment Securities Sold | Integer		157		112
Available-for-sale Securities Pledged as Collateral	$ 165,900	$ 165,900		$ 157,800
Description of Holding Securities		there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders’ equity.		there were no holdings of securities of any one issuer, other than the U.S. Government and its agencies, in an amount greater than 10% of stockholders’ equity.
Loss on equity securities, net	$ 47	$ 168