Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

Summary of Restricted Share Activity

A summary of restricted share activity as of June 30, 2020 and changes during the six months then ended is as follows:

	Shares	Weighted-Average Grant Date Fair Value
Outstanding at January 1, 2020	471,271	$	60.09
Granted	399,578	$	32.72
Vested and issued	(161,081)	$	51.45
Expired or forfeited	(69,499)	$	58.42
Outstanding at June 30, 2020	640,269	$	44.00

Stock Settled Share Appreciation Rights

A summary of stock-settled SARs activity as of June 30, 2020 and changes during the six months then ended is as follows:

	Shares	Weighted-Average Exercise Price
Outstanding at January 1, 2020	625,368	$	33.60
Exercised	(415,274)	$	32.25
Expired or forfeited	—	$	—
Outstanding at June 30, 2020	210,094	$	36.26