Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [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,
	2020		2019		2020		2019
Share-Based Compensation Expense Allocation Details:
Cost of services	$	1.5	$	1.5	$	3.4	$	2.8
Selling, general and administrative	2.8		3.1		5.7		6.1
Other	—		—		—		0.1
Total share-based compensation expense	$	4.3	$	4.6	$	9.1	$	9.0

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, 2020 and 2019:

	Six Months Ended June 30,
	2020	2019
Expected dividend yield	—%	—%
Risk-free interest rate	0.4% to 1.7%	1.9% to 2.5%
Expected volatility	43%	40% to 45%
Expected term (in years)	5.5	2.00 to 5.50

Schedule of Stock Options Activity

A summary of the options activity during the six months ended June 30, 2020 is shown below:

	Options	Weighted- Average Exercise Price
Outstanding at December 31, 2019	10,680,340	$	5.59
Granted	65,933	10.54
Exercised	(1,017,656)	4.19
Canceled/forfeited	(76,259)	2.57
Expired	(1,214,220)	14.62
Outstanding at June 30, 2020	8,438,138	$	4.52
Outstanding, vested and exercisable at June 30, 2020	7,251,608	$	4.69
Outstanding, vested and exercisable at December 31, 2019	7,868,280	$	6.57

Schedule of Non-Options Awards Activity

A summary of the RSA, RSU, and PBRSU activity during the six months ended June 30, 2020 is shown below:

							Weighted- Average Grant Date Fair Value
	RSAs		RSUs		PBRSUs			RSU		PBRSU
Outstanding and unvested at December 31, 2019	—		1,373,356		4,119,436			$	8.03	$	6.37
Granted	—		1,443,143		203,874			9.87		9.81
Vested	—		(464,758)		—			6.50		—
Forfeited	—		(57,467)		(181,543)			6.46		5.73
Outstanding and unvested at June 30, 2020	—		2,294,274		4,141,767			$	9.54	$	6.57
Shares surrendered for taxes for the six months ended June 30, 2020	—		128,906		—
Cost of shares surrendered for taxes for the six months ended June 30, 2020 (in millions)	$	—	$	1.1	$	—
Shares surrendered for taxes for the six months ended June 30, 2019	380,564		106,173		—
Cost of shares surrendered for taxes for the six months ended June 30, 2019 (in millions)	$	3.7	$	1.0	$	—