Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Restricted Share

The following table summarizes restricted share activity for the six months ended June 30, 2018:

	Six Months Ended June 30, 2018
				Weighted-
				Average Grant
	Shares			Date Fair Value
Unvested restricted shares at beginning of period		245,570		$	41.33
Restricted shares granted		261,059			40.80
Restricted shares vested		(14,214	)		47.08
Restricted shares forfeited		(1,965	)		39.10
Unvested restricted shares at end of period		490,450		$	40.89