Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Share-based Payment Arrangement [Abstract]

Restricted Stock Unit and Performance Share Transactions

A summary of restricted stock units, performance shares and stock options for the year ended December 31, 2021, is shown below:

	Restricted Stock Units	Weighted Average Grant Date Fair Value	Performance Shares	Weighted Average Grant Date Fair Value	Stock Options	Weighted Average Grant Date Fair Value
Outstanding as of December 31, 2020	616,584	$124.83	809,471	$143.48	108,446	$30.32
Granted	168,763	$165.28	175,546	$188.11	94,256	$35.33
Distributed (vested)	(202,737)		(21,119)		—
Cancelled	(14,719)		(183,354)		—
Outstanding as of December 31, 2021 (1)	567,891	$129.58	780,544	$156.56	202,702	$32.65
Vested or expected to vest as of December 31, 2021	567,891		397,755		202,702

(1) Outstanding performance shares are reflected at the maximum possible payout that may be earned during the relevant performance periods.