Employee Benefits and Stock Compensation - Summary of Stock Options Outstanding and Exercisable (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Shares granted	243,391	63,650	413,000
Equity Option [Member]
Options, Outstanding at January 1, 2016	556,647
Shares granted	243,391
Options, Exercised	(12,400)
Options, Forfeited	(8,860)
Options, Outstanding at December 31, 2016	778,778	556,647
Options, Exercisable at December 31, 2016	432,660
Weighted-Average Exercise Price, Outstanding at January 1, 2016	$ 18.02
Weighted-Average Exercise Price, Granted	14.94
Weighted-Average Exercise Price, Exercised	10.82
Weighted-Average Exercise Price, Forfeited	133.60
Weighted-Average Exercise Price, Outstanding at December 31, 2016	15.86	$ 18.02
Weighted-Average Exercise Price, Exercisable at December 31, 2016	$ 17.73
Weighted-Average Remaining Contractual Term, Outstanding	6 years 10 months 17 days
Weighted-Average Remaining Contractual Term, Exercisable at December 31, 2016	6 years 8 months 23 days
Aggregate Intrinsic Value, Outstanding at December 31, 2016	$ 7,369
Aggregate Intrinsic Value, Exercisable at December 31, 2016	$ 4,412