Equity Incentive Plan (Details) - Restricted Stock [Member]	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Outstanding, Unvested restricted stock at beginning of the period	227,532
Shares Outstanding, Restricted stock granted	75,038
Shares Outstanding, Restricted stock vested	(72,923)
Shares Outstanding, Restricted stock forfeited	0
Shares Outstanding, Unvested restricted stock at end of the period	229,647
Weighted Average Grant Date Fair Value, Unvested restricted stock at beginning of the period (in dollars per share) | $ / shares	$ 33.02
Weighted Average Grant Date Fair Value, Restricted stock granted (in dollars per share) | $ / shares	48.62
Weighted Average Grant Date Fair Value, Restricted stock vested (in dollars per share) | $ / shares	30.47
Weighted Average Grant Date Fair Value, Unvested restricted stock at end of the period (in dollars per share) | $ / shares	$ 38.92