A summary of activity related to non-vested performance-based restricted share units is presented below (units in thousands):


	Number of Non-vested Performance- Based Share Units	Weighted- Average Grant Date Fair Value Per Share		Weighted- Average Remaining Term in Years	Aggregate Intrinsic Value
Non-vested performance-based share units outstanding at December 31, 2019	653	$	61.44
Granted	291	$	55.08
Vested	(184)	$	68.89
Forfeited	(9)	$	70.60
Non-vested performance-based share units outstanding at December 31, 2020	751	$	57.13	1.4	$	33.6
Granted	381	$	41.04
Vested	(188)	$	75.58
Forfeited	(26)	$	47.74
Non-vested performance-based share units outstanding at December 31, 2021	918	$	47.10	1.2	$	35.7

Tabular disclosure of the changes in outstanding nonvested performance-based units.

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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year.

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Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding performance-based awards that are fully vested and expected to vest. Includes, but is not limited to, unvested awards for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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