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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Share-Based Compensation Expense

The table below reflects the total share-based compensation expense recognized in our Consolidated Statements of Comprehensive Income for the years ended December 31, 2020, 2019 and 2018:

			2020												2019												2018
									Restricted												Restricted												Restricted
Income Statement Classification			Options (1)						Shares (2)						Options (1)						Shares (2)						Options (1)						Shares (2)
Direct cost of revenues			$	9					$	13,080					$	497					$	11,869					$	780					$	9,804
Selling, general and administrative expenses			126						11,926						2,628						9,005						2,027						8,191
Total			$	135					$	25,006					$	3,125					$	20,874					$	2,807					$	17,995

(1)Includes options and cash-settled stock appreciation rights.

(2)Includes restricted share awards, restricted stock units, performance stock units and cash-settled restricted stock units.

Schedule of Stock Option Activity

A summary of our stock option activity during the year ended December 31, 2020 is presented below. The aggregate intrinsic value of stock options outstanding and exercisable, or fully vested, at December 31, 2020 in the table below represents the total pre-tax intrinsic value, which is calculated as the difference between the closing price of our common stock on the last trading day of 2020 and the exercise price, multiplied by the number of in-the-money options that would have been received by the option holders had all option holders exercised their options on December 31, 2020. The aggregate intrinsic value changes based on fluctuations in the fair market value per share of our common stock. 

			Options						Weighted Average Exercise Price						Weighted Average Remaining Contractual Term (in Years)						Aggregate Intrinsic Value
Stock options outstanding at December 31, 2019			678						$	35.98
Stock options granted			—						N/A
Stock options exercised			(140)						$	35.14
Stock options forfeited			—						N/A
Stock options outstanding at December 31, 2020			538						$	36.20					4.3						$	40,065
Stock options exercisable at December 31, 2020			538						$	36.20					4.3						$	40,065

Schedule of Unvested Restricted Share Awards Activity

A summary of our restricted share awards activity during the year ended December 31, 2020 is presented below:

			Shares						Weighted Average Grant Date Fair Value
Unvested restricted share awards outstanding at December 31, 2019			957						$	52.86
Restricted share awards granted			165						$	116.75
Restricted share awards vested			(242)						$	48.95
Restricted share awards forfeited			(7)						$	56.08
Unvested restricted share awards outstanding at December 31, 2020			873						$	66.00

Schedule of Restricted Stock Unit Activity

A summary of our restricted stock units activity during the year ended December 31, 2020 is presented below:

			Shares						Weighted Average Grant Date Fair Value
Restricted stock units outstanding at December 31, 2019			313						$	43.45
Restricted stock units granted			57						$	114.95
Restricted stock units released			(55)						$	48.08
Restricted stock units forfeited			—						N/A
Restricted stock units outstanding at December 31, 2020			315						$	55.45

Schedule of Performance Stock Units Activity

A summary of our performance stock units activity during the year ended December 31, 2020 is presented below:

			Shares						Weighted Average Grant Date Fair Value
Performance stock units outstanding at December 31, 2019			361						$	60.67
Performance stock units granted (1)			109						$	130.58
Performance stock units released			(100)						$	37.48
Performance stock units forfeited			—						N/A
Performance stock units outstanding at December 31, 2020			370						$	87.50

(1)    Performance stock units granted are presented at the maximum potential payout percentage of 150% of target shares granted.

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