Equity Compensation Plans - Restricted Stock Outstanding (Details) - Restricted Stock - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Shares
Outstanding at beginning of period (in shares)	204,515	187,180	109,464
Granted (in shares)	134,364	144,056	141,069
Vested (in shares)	(61,928)	(50,107)	(42,675)
Forfeited (in shares)	(19,444)	(76,614)	(20,678)
Balance at End of Period (in shares)	257,507	204,515	187,180
Weighted Average Grant Date Fair Market Value
Outstanding at beginning of period (in dollars per share)	$ 14.27	$ 18.22	$ 15.97
Granted (in dollars per share)	16.52	11.89	19.03
Vested (in dollars per share)	14.97	17.28	14.87
Forfeited (in dollars per share)	14.78	18.01	18.74
Balance at End of Period (in dollars per share)	$ 15.23	$ 14.27	$ 18.22