Subordinated Notes (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 06, 2015	Dec. 31, 2017	Dec. 31, 2016	Feb. 13, 2015
Subordinated notes		$ 23,000	$ 23,000
Subordinated note terms and conditions		Interest will accrue at a fixed per annum rate of 6.25% from and including the issue date to but excluding February 15, 2020. From and including February 15, 2020 to but excluding the maturity date interest will accrue at a floating rate equal to the three-month LIBOR plus 479 basis points. Interest is payable on the notes on February 15 and August 15 of each year, commencing August 15, 2015, through February 15, 2020, and thereafter February 15, May 15, August 15 and November 15 of each year through the maturity date or earlier redemption date.
Preferred stock, redemption date		Feb. 13, 2015
Preferred stock, value				$ 20,000
Subordinated Debt [Member]
Subordinated notes due date	Feb. 15, 2025
Subordinated notes interest rate	6.25%	6.25%	6.25%
Subordinated notes	$ 23,000
Debt Instrument, Maturity Date		Feb. 15, 2020
Subordinated Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt instrument, percent spread on variable rate		4.79%