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STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of Components of Stock-Based Compensation Expenses
The following table summarizes the components of stock-based compensation expense recognized in the Company’s condensed consolidated statements of income for the periods indicated:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
Cost of revenues (exclusive of depreciation and amortization)$17,474 $12,174 $31,782 $34,552 
Selling, general and administrative expenses15,813 17,013 36,510 43,086 
Total$33,287 $29,187 $68,292 $77,638 
Schedule of Stock Options Activity
Stock option activity under the Company’s plans is set forth below:
 Number of
Options 		Weighted Average
Exercise Price 		Aggregate
Intrinsic Value 		Weighted Average
Remaining Contractual Term (in years)
Options outstanding at January 1, 2022
2,318 $77.79 
Options granted132 $277.70 
Options exercised(445)$43.30 
Options forfeited(10)$333.32 
Options expired(1)$396.69 
Options outstanding at September 30, 2022
1,994 $97.40 $532,497 3.6
Options vested and exercisable as of September 30, 2022
1,694 $66.24 $502,221 2.8
Options expected to vest as of September 30, 2022
280 $272.07 $28,521 8.5
Schedule of Service-Based Awards Activity
The table below summarizes activity related to the Company’s equity-classified and liability-classified service-based awards for the nine months ended September 30, 2022:
Equity-Classified
 Restricted Stock
Equity-Classified
Equity-Settled
Restricted Stock Units
Liability-Classified
Cash-Settled
Restricted Stock Units
 
Number of
Shares 
Weighted Average Grant Date
Fair Value Per Share 
Number of
Shares 
Weighted Average Grant Date
Fair Value Per Share 
Number of
Shares 
Weighted Average Grant Date
Fair Value Per Share 
Unvested service-based awards outstanding at January 1, 2022
9 $167.18 576 $277.38 112 $217.28 
Awards granted— $— 644 $286.13 51 $269.60 
Awards modified— $— (3)$387.74 3 $220.00 
Awards vested(9)$167.18 (222)$221.51 (54)$182.32 
Awards forfeited/cancelled— $— (55)$333.41 (11)$261.04 
Unvested service-based awards outstanding at September 30, 2022
— $— 940 $292.98 101 $258.01 
Schedule of Performance-Based Awards Activity
The table below summarizes activity related to the Company’s equity-classified performance-based awards for the nine months ended September 30, 2022:
Equity-Classified
Equity-Settled
Restricted Stock
Equity-Classified
Equity-Settled
Restricted Stock Units
 
Number of
Shares 
Weighted Average Grant Date
Fair Value Per Share 
Number of
Shares 
Weighted Average Grant Date
Fair Value Per Share 
Unvested performance-based awards outstanding at January 1, 2022
9 $165.87 23 $339.69 
Awards granted— $— 6 $418.26 
Awards vested— — (2)$355.39 
Awards forfeited/cancelled— — (5)$375.77 
Unvested performance-based awards outstanding at September 30, 2022
9 $165.87 22 $351.60