Equity Incentive Plan (Tables)

6 Months Ended

Jun. 30, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

Restricted stock activity is summarized as follows:

	Shares Outstanding		Weighted Average Grant Date Fair Value
Unvested restricted stock at December 31, 2016		227,532	$	33.02
Restricted stock granted		75,038	$	48.62
Restricted stock vested		(72,923)	$	30.47
Restricted stock forfeited		-
Unvested restricted stock at June 30, 2017		229,647	$	38.92