Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Stock-Based Compensation Abstract

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

			Weighted-Average		Weighted-Average
	Equity		Grant Date		Remaining	Aggregate
	Awards		Fair Value		Contractual Life	Fair Value
					(in years)		(in millions)
Unvested outstanding as of December 31, 2015	827,383	(1)	$	4.09	2.12	$	3.4
Granted	410,371	(2)		10.79
Vested	(202,431)			5.56
Unvested outstanding as of June 30, 2016	1,035,323		$	6.46	1.91	$	6.7

(1) Includes 475,409 of performance awards at 135% of target and 351,974 time-based awards at 100% of target.

(2) Includes 178,172 of performance awards at 100% of target and 232,199 time-based awards at 100% of target.

Schedule of Share-based Compensation, Stock Options, Activity

							Weighted-Average
		Range of			Weighted-Average		Remaining		Aggregate
	Options	Exercise Prices			Exercise Price		Contractual Life		Intrinsic Value
							(in years)		(in millions)
Outstanding and Exercisable as of December 31, 2014	398,200	$ 2.44	-	$16.27	$	7.88
Exercised
Expired	(86,000)			$11.30	$	11.30
Outstanding and Exercisable as of December 31, 2015	312,200	$ 2.44	-	$16.27	$	6.94		3.47	$	1.3
Exercised	(132,900)	$ 2.44	-	$3.94	$	2.89
Outstanding and Exercisable as of             June 30, 2016	179,300	$ 2.44	-	$16.27	$	9.94		3.24	$	0.9