Common Stock and Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

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

Schedule of Restricted Stock Unit Activity

The following table summarizes RSU activity during the six months ended June 30, 2018:

	Employees			Non-Employee Directors			Total
RSUs outstanding at January 1, 2018	545,405			85,829			631,234
RSUs granted	717,744			95,669			813,413
Shares issued upon vesting of RSUs	(166,389		)	(38,454		)	(204,843		)
RSUs canceled or forfeited(1)	(164,033		)	(1,915		)	(165,948		)
RSUs outstanding at June 30, 2018	932,727			141,129			1,073,856
Weighted average grant date fair value	$	11.52		$	11.98		$	11.58

(1) Pursuant to the terms of our plans, employees have the option of forfeiting RSUs to cover their minimum statutory tax withholding when shares are issued. Any RSUs surrendered or canceled in satisfaction of participants’ tax withholding obligations are not available for future grants under the plans.

The following table summarizes PSU activity during the six months ended June 30, 2018:

	PSUs		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	121,807		$	18.62
Granted	290,609		8.79
Vested	—		—
Forfeited or canceled	(21,870	)	10.98
Performance adjustment(1)	(85,795	)	18.13
Outstanding at June 30, 2018	304,751		$	9.93

(1) Represents an adjustment to the 2017 tranche of the 2016 and 2017 PSU awards based on actual performance during the 2017 annual performance period in relation to the established performance goal for that period. The actual performance for the 2017 annual performance period was certified by the Compensation Committee of our Board of Directors in the first quarter of 2018.

Schedule of Phantom Share Activity

The following table summarizes the phantom share activity during the six months ended June 30, 2018:

	Shares		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	1,322,580		$	18.26
Granted	1,618,179		8.80
Converted/paid	(595,402	)	18.03
Forfeited	(264,215	)	13.47
Outstanding at June 30, 2018	2,081,142		$	11.58

Schedule of Stock Option Activity

The following table summarizes stock option activity during the six months ended June 30, 2018:

	Options		Weighted Average Exercise Price		Weighted Average Contractual Life (Years)	Aggregate Intrinsic Value
Options outstanding and exercisable at January 1, 2018	700,467		$	17.21
Forfeited and canceled	(270,922	)	21.00
Exercised	—		—
Options outstanding and exercisable at June 30, 2018	429,545		$	14.81	1.41	$	65,143

Schedule of Share-Based Compensation Expense Recognized

The following table summarizes the share-based compensation expense recognized during the three and six months ended June 30, 2018 and 2017:

	Three Months Ended June 30					Six Months Ended June 30
	2018		2017			2018		2017
	(In thousands)
RSUs	$	1,399	$	1,046		$	2,545	$	2,654
PSUs	551		(1,051		)	1,147		(551		)
Phantom shares	2,520		2,707			2,933		4,556
Total	$	4,470	$	2,702		$	6,625	$	6,659