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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Restricted Stock Award Activity for Employees and Non-Employee Directors

The following table summarizes our restricted stock award activity for employees and non-employee directors:

		Shares				Weighted Average Grant Date Fair Value Per Share
Unvested at January 1, 2021			139,863			$	121.53
Granted			49,969				213.55
Vested			(71,426	)			116.49
Forfeited			(2,830	)			156.77
Unvested at December 31, 2021			115,576			$	163.57

Summary of Activity for PBRSUs for Employees

The following table summarizes our activity for PBRSUs for employees during 2021:

		Shares				Weighted Average Grant Date Fair Value Per Share
Unvested at January 1, 2021			31,072			$	146.29
Granted (a)			37,288				204.84
Vested			(10,353	)			146.29
Forfeited			—				—
Unvested at December 31, 2021			58,007			$	183.93

^(a) PBRSUs earned may range from zero to 200% of the target award. Actual PBRSUs earned for the 2021 performance period, as determined by the Compensation Committee, were equal to 200% of the target amount.

Summary of the Changes in the Number of Outstanding Phantom Stock Shares

A summary of the changes in the number of outstanding phantom stock awards during the year ended December 31, 2021 for the Phantom Plans is provided below. There were no shares granted, settled or forfeited during 2021.

		Employee Phantom Plans				Director Phantom Stock Plan				Total
Balance of shares outstanding at December 31, 2021 and 2020			532,890				81,106				613,996

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Tabular disclosure of share-based payment arrangement.

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

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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