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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Expense
Stock-based compensation expense is summarized as follows: 
 Years Ended December 31,
(in thousands)202120202019
Stock-based compensation expense$26,225 $21,481 $22,232 
Schedule of Restricted Stock Units Activity
RSU activity, inclusive of PSUs, for the year ended December 31, 2021 is summarized as follows: 
Number
of shares		Weighted Average
Grant Date
Fair Value
Outstanding at December 31, 2020533,185 $106.19 
Granted107,367 $268.65 
Forfeited(24,699)$129.96 
Settled(185,123)$123.19 
Outstanding at December 31, 2021430,730 $138.01 
Schedule of Grant-date Intrinsic Value of RSUs Granted
Years Ended December 31,
(in millions, except per share values)202120202019
Weighted-average grant-date fair value per share$268.65 $86.73 $108.42 
Fair value of RSUs vested$22.8 $21.8 $17.8 
Schedule of Stock Option Activity
Stock option activity for the year ended December 31, 2021 is summarized as follows: 
Number
of shares		Weighted
Average
Exercise Price
Outstanding at December 31, 20201,193 $55.18 
Exercised(1,193)$55.18 
Outstanding at December 31, 2021— $— 
Vested and exercisable at December 31, 2021— $—