Share-based Compensation and Non-Qualified Deferred Compensation Plan (Tables)

3 Months Ended

Mar. 31, 2019

Share-based Compensation [Abstract]

Summary of Share Incentive Plans

A summary of activity under our share incentive plans for the year ended March 31, 2019 is shown below:

	Nonvested Share Awards Outstanding		Weighted Average Exercise /  Grant Price
Nonvested share awards outstanding at December 31, 2018	390,681		$	79.82
Granted	179,632		98.58
Vested	(234,971	)	80.30
Forfeited	(9,341	)	83.20
Total nonvested share awards outstanding at March 31, 2019	326,001		$	89.71