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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [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, 2016, 2015 and 2014.

		2016								2015								2014
						Restricted								Restricted								Restricted
Income Statement Classification		Options(1)				Shares(2)				Options(1)				Shares(2)				Options(1)				Shares(2)
Direct cost of revenues		$	2,815			$	7,530			$	3,736			$	6,532			$	5,404			$	8,951
Selling, general and administrative expenses			966				9,117				1,482				7,469				1,783				8,508
Special charges(3)			56				49				—				—				(126	)			(990	)
Total		$	3,837			$	16,696			$	5,218			$	14,001			$	7,061			$	16,469

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

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

⁽³⁾ Expense acceleration of $0.2 million related to restricted shares and $0.1 million related to options were netted with expense reversal resulting from forfeitures of $1.2 million and $0.2 million, respectively, for the year ended December 31, 2014. There were no forfeitures related to special charges for the year ended December 31, 2016. (See Note 4, “Special Charges” for information related to the special charges).

Schedule of Stock Option and Grants Using Valuation Assumptions

We use the Black-Scholes option-pricing model to value our option grants using the assumptions in the following table.

		Year Ended December 31,
Assumptions		2016				2015				2014
Risk-free interest rate			0.98%			1.07% - 1.70%				0.99% - 1.94%
Dividend yield			0%				0%				0%
Expected term		3 years				3-5 years				3-6 years
Stock price volatility			34.33%			31.03% - 40.36%				31.05% - 37.60%

Schedule of Stock Option Activity

The aggregate intrinsic value 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 2016 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, 2016. The aggregate intrinsic value changes based on fluctuations in the fair market value per share of our common stock.

										Weighted
										Average
						Weighted				Remaining
						Average				Contractual				Aggregate
						Exercise				Term				Intrinsic
		Shares				Price				(in Years)				Value
Stock options outstanding at December 31, 2015			3,349			$	39.01
Stock options granted			119			$	34.33
Stock options exercised			(816	)		$	33.30
Stock options forfeited			(234	)		$	38.17
Stock options outstanding at December 31, 2016			2,418			$	40.79				4.8			$	16,876
Stock options exercisable at December 31, 2016			1,593			$	43.95				3.8			$	8,290

Schedule of Stock Options Outstanding and Exercisable Price Range Status

The following is a summary of stock options outstanding and exercisable as of December 31, 2016.

		Options Outstanding												Options Exercisable
										Weighted
										Average
						Weighted				Remaining								Weighted
						Average				Contractual								Average
						Exercise				Term								Exercise
Exercise Price Range		Shares				Price				(in Years)				Shares				Price
$26.68 - $33.95			544			$	31.51				6.2				216			$	32.03
$34.33 - $36.87			556			$	35.66				6.9				246			$	35.95
$36.89 - $39.54			484			$	38.01				4.4				376			$	38.14
$39.84 - $54.30			486			$	45.13				3.6				407			$	45.67
$55.63 - $70.55			348			$	61.28				1.6				348			$	61.28
			2,418												1,593

Schedule of Unvested Restricted Stock-Based Activity

The fair value of unvested restricted share awards is determined based on the closing market price per share of our common stock on the grant date

						Weighted
						Average Grant
						Date Fair
		Shares				Value
Unvested restricted share awards outstanding at December 31, 2015			783			$	36.55
Restricted share awards granted			527			$	38.37
Restricted share awards vested			(280	)		$	35.67
Restricted share awards forfeited			(89	)		$	35.50
Unvested restricted share awards outstanding at December 31, 2016			941			$	37.92

Schedule of Restricted Stock Unit Activity

The fair value of restricted stock units is determined based on the closing market price per share of our common stock on the grant date

						Weighted
						Average Grant
						Date Fair				Intrinsic
		Shares				Value				Value
Restricted stock units outstanding at December 31, 2015			623			$	37.53
Restricted stock units granted			66			$	36.02
Restricted stock units released			(221	)		$	36.32
Restricted stock units forfeited			(3	)		$	40.46
Restricted stock units outstanding at December 31, 2016			465			$	37.87			$	20,980

Schedule of Performance Stock Units Activity

The fair value of performance stock units is determined based on the closing market price per share of our common stock on the grant date.

						Weighted
						Average Grant
						Date Fair				Intrinsic
		Shares				Value				Value
Performance stock units outstanding at December 31, 2015			135			$	28.62
Performance stock units granted			84			$	23.83
Performance stock units released			—			$	—
Performance stock units forfeited			(13	)		$	29.11
Performance stock units outstanding at December 31, 2016			206			$	26.64			$	9,276

Schedule of Weighted-Average Grant Date Fair Value Per Share of Stock Options, Restricted Share Awards, Restricted Stock Units and Performance Stock Units Awarded

The table below reflects the weighted average grant date fair value per share of stock options, restricted share awards, restricted stock units and performance stock units awarded during the years ended December 31, 2016, 2015 and 2014.

		Year Ended December 31,
		2016				2015				2014
Weighted average fair value of grants
Stock options		$	8.41			$	10.85			$	10.77
Restricted share awards, restricted stock units and performance stock units		$	37.64			$	39.01			$	32.87

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