Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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	406,586	(2)		10.77
Vested	(202,431)			5.56
Unvested outstanding as of March 31, 2016	1,031,538		$	6.43	2.16	$	6.6
(1)    Includes 475,409 of performance awards awarded at 135% of target and time-based awards at 100% of target.
(2)    Includes 178,172 of performance awards 100% of target and 228,414 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	$	6.94
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	(7,747)			$2.78	$	2.78
Outstanding and Exercisable as of March 31, 2016	304,453	$ 2.44	-	$16.27	$	7.04		3.22	$	1.4