Benefit Plans - Restricted Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Weighted Average Grant-Date Fair Value per share
Compensation expense	$ 883	$ 905	$ 514
Restricted Stock
Shares
Unvested at the beginning of the year (in shares)	60,000
Granted (in shares)	340,825
Vested (in shares)	(16,666)
Forfeited (in shares)	(13,825)
Unvested at the end of the year (in shares)	370,334.000	60,000
Weighted Average Grant-Date Fair Value per share
Unvested at the beginning of the year (in dollars per share)	$ 15.46
Granted (in dollars per share)	24.30
Vested (in dollars per share)	15.16
Forfeited (in dollars per share)	17.60
Unvested at the end of the year (in dollars per share)	$ 23.53	$ 15.46
Compensation expense	$ 1,846
Grant date fair value	8,300
Unrecognized compensation expense	$ 6,883