Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Share-Based Compensation [Abstract]

Non-vested Stock and Performance Unit Activity

The following table summarizes the non-vested stock and performance stock unit activity:

(In thousands except fair value)	Shares			Grant Date Weighted Average Fair Value		Aggregate Intrinsic Value
Outstanding at December 31, 2017		412		$	65.64	$	30,113
Granted		142			59.45
Vested		(111	)		56.91
Cancelled		(63	)		64.71
Outstanding at December 31, 2018		380			66.02		21,239
Granted		134			60.04
Vested		(46	)		63.61
Cancelled		(64	)		62.39
Outstanding at December 31, 2019		404			64.89		26,710
Granted		142			65.61
Vested		(27	)		74.21
Cancelled		(68	)		73.39
Outstanding at December 31, 2020		451		$	63.28	$	33,283