Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation Expense

Total share-based compensation costs that have been included in the Company’s consolidated statements of operations were as follows (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Share-Based Compensation Expense Allocation Details:
Cost of services	$	1.5	$	1.0	$	2.8	$	2.1
Selling, general and administrative	3.5		1.1		6.1		3.6
Other	0.1		0.1		0.1		0.1
Total share-based compensation expense (1)	$	5.1	$	2.2	$	9.0	$	5.8

(1) Includes $0.1 million in share-based compensation expense paid in cash during the three and six months ended June 30, 2017, respectively. No shared-based compensation expense was paid in cash during the three or six month periods ended June 30, 2018. In addition to the share-based compensation expense recorded above, $0.1 million and $0.2 million of share-based compensation expense was capitalized to deferred contract costs for the three and six months ended June 30, 2018, respectively, and $0 million and $0.3 million during the three and six months ended June 30, 2017, respectively. See Note 20, Deferred Contract Costs, for further discussion.

Summary of Valuation Assumptions

The following table sets forth the significant assumptions used in the Black-Scholes option pricing model and the Monte Carlo simulations and the calculation of share-based compensation expense for the six months ended June 30, 2018 and 2017:

	Six Months Ended June 30,
	2018	2017
Expected dividend yield	—	—
Risk-free interest rate	2.3% to 2.7%	1.9% to 2.3%
Expected volatility	40% to 45%	45%
Expected term (in years)	2.59 to 6.25	6.25 to 6.29

Schedule of Stock Option Activity

A summary of the options activity during the six months ended June 30, 2018 is shown below:

	Shares		Weighted- Average Exercise Price
Outstanding at December 31, 2017	17,742,966		$	4.70
Granted	204,942		5.53
Exercised	(1,117,588	)	2.55
Canceled/forfeited	(1,284,812	)	2.52
Outstanding at June 30, 2018	15,545,508		5.04
Outstanding, vested and exercisable at June 30, 2018	7,986,285		7.22
Outstanding, vested and exercisable at December 31, 2017	5,778,376		$	8.87

Schedule of Restricted Stock Awards Activity

A summary of the RSA activity during the six months ended June 30, 2018 is shown below:

	Shares		Weighted- Average Grant Date Fair Value
Outstanding and unvested at December 31, 2017	2,352,490		$	3.03
Granted	—		—
Vested	(1,184,687	)	3.07
Forfeited	(18,945	)	3.35
Outstanding and unvested at June 30, 2018	1,148,858		$	3.03

Schedule of Restricted Stock Units Award Activity

A summary of the PBRSU activity during the six months ended June 30, 2018 is shown below:

	Shares		Weighted- Average Grant Date Fair Value
Outstanding and unvested at December 31, 2017	4,785,900		$	3.37
Granted	1,456,671		8.29
Vested	—		—
Forfeited	(863,761	)	3.92
Outstanding and unvested at June 30, 2018	5,378,810		$	4.59

A summary of the RSU activity during the six months ended June 30, 2018 is shown below:

	Shares		Weighted- Average Grant Date Fair Value
Outstanding and unvested at December 31, 2017	1,183,500		$	2.50
Granted	417,008		7.96
Vested	(294,825	)	2.40
Forfeited	(73,885	)	2.49
Outstanding and unvested at June 30, 2018	1,231,798		$	4.37