Equity Plan - Restricted Stock Activity (Details) - Restricted stock	6 Months Ended
	Jun. 30, 2018 $ / shares shares
Number of Shares
Nonvested shares at the beginning of the period (in shares) | shares	181,185
Granted (in shares) | shares	97,818
Vested (in shares) | shares	(59,515)
Nonvested shares at the end of the period (in shares) | shares	219,488
Weighted Average Grant Date Fair Value
Nonvested shares at the beginning of the period (in dollars per share) | $ / shares	$ 11.66
Granted (in dollars per share) | $ / shares	16.83
Vested (in dollars per share) | $ / shares	11.80
Nonvested shares at the end of the period (in dollars per share) | $ / shares	$ 13.92