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Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Summary of Expense Related to Share-Based Payments
The following table summarizes the expense recognized within general and administrative expenses in the Unaudited Consolidated Statements of Income related to stock-based compensation for the three and six months ended June 30, 2024 and 2023 (in thousands):
 
 Three Months Ended June 30,Six Months Ended June 30,
 2024202320242023
Stock options$5,123 $4,611 $11,242 $13,561 
Restricted stock21,985 30,137 40,845 47,283 
Stock-based compensation$27,108 $34,748 $52,087 $60,844 
Summary of Total Unrecognized Compensation Cost Related to Stock-Based Compensation
The following table summarizes the Company’s total unrecognized compensation cost related to outstanding stock awards as of June 30, 2024 (cost in thousands):
Unrecognized
Compensation
Cost
Weighted Average
Period of Expense
Recognition Remaining
(in Years)
Stock options$44,454 2.24
Restricted stock79,240 1.04
Total$123,694 
Summary of Changes in Number of Shares of Common Stock Under Option
The following summarizes the changes in the number of shares of stock options outstanding for the six months ended June 30, 2024 (shares and aggregate intrinsic value in thousands):
SharesWeighted
Average
Exercise
Price
Options
Exercisable
at End of
Period
Weighted
Average
Exercise
Price of
Exercisable
Options
Weighted
Average Fair
Value of
Options
Granted 
During the Period
Aggregate
Intrinsic
Value
Outstanding at December 31, 20234,983 $192.18 3,182 $163.54 $451,039 
Granted142 273.01 $95.98 
Exercised(579)172.50 $65,377 
Forfeited(55)226.62 
Outstanding at June 30, 20244,491 $196.82 2,862 $167.07 $314,694 
Expected to vest as of June 30, 2024780 $235.77 
Summary of Changes in Number of Shares of Restricted Stock and Restricted Stock Units
The following table summarizes the changes in the number of shares of restricted stock awards and restricted stock units outstanding for the six months ended June 30, 2024 (shares in thousands):
 
SharesWeighted
Average
Grant Date
Fair Value
Outstanding at December 31, 2023542 $219.61 
Granted347 276.44 
Issued(365)225.19 
Cancelled(47)227.06 
Outstanding at June 30, 2024477 $255.95