Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2015

Stock-based Compensation

Schedule of restricted stock award transactions and other information

	Shares			Weighted Average Grant Date Fair Value
	(share amounts in thousands)
Unvested Balance, January 1, 2015		3,728		$	10.82
Granted		1,385			13.94
Vested		(992	)		9.07
Forfeited		(304	)		12.28
Unvested Balance, December 31, 2015		3,817		$	12.29

Schedule of stock compensation expense recognized

	For the Year Ended December 31,
	2013		2014		2015
	(in thousands)
Stock compensation expense:
Included in general and administrative	$	5,276	$	9,027	$	11,633
Included in cost of services		1,757		2,015		3,046
Total	$	7,033	$	11,042	$	14,679

Schedule of stock compensation expense based on current share-based awards for each of the next five years

	2016		2017		2018		2019		2020
	(in thousands)
Stock compensation expense	$	15,532	$	10,610	$	5,204	$	1,406	$	324