Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of Share-Based Compensation Expense

	Successor		Predecessor
	Period From		Period From
	September 13, 2016 Through		January 1, 2016 Through			Year Ended December 31,
	December 31, 2016		September 12, 2016			2015			2014
Equity-classified awards	$	81	$	1,511		$	4,540		$	3,627
Liability-classified awards	—		(19		)	(711		)	4,520
	$	81	$	1,492		$	3,829		$	8,147

Fair Value of Each Option Award Estimated on Date of Grant Using Black-Scholes-Merton Option-Pricing Formula

The fair value of each option award was estimated on the date of grant using the Black-Scholes-Merton option-pricing formula. Expected volatilities were based on historical changes in the market value of our stock. Separate groups of employees that had similar historical exercise behavior were considered separately to estimate expected lives. Options granted had a maximum term of ten years. We based the risk-free interest rate on the U.S. Treasury rate for the week of the grant having a term equal to the expected life of the option. 

The ranges for the assumptions used in the Black-Scholes-Merton pricing formula for the Predecessor stock options granted in the periods presented were as follows:

	Predecessor
	Year Ended December 31,
	2015	2014
Expected volatility	64.6% to 69.4%	56.2% to 63.7%
Dividend yield	0.00% to 0.00%	0.00% to 0.00%
Expected life	3.5 to 4.6 years	3.5 to 4.6 years
Risk-free interest rate	0.87% to 1.54%	0.82% to 1.63%

Activity of Awarded Options

The following table summarizes activity for our most recent fiscal year with respect to stock options: 

	Shares Under Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value
Balance as of January 1, 2016 (Predecessor)	3,083,821		$	16.05
Granted	—		—
Exercised	—		—
Forfeited or expired	—		—
Canceled	(3,083,821	)	$	16.05
Balance as of December 31, 2016 (Successor)	—		$	—	—	$	—
Exercisable as of end of year (Successor)	—		$	—	—	$	—

Activity of Awarded Deferred Common Stock Units

The following table summarizes activity for our most recent fiscal year with respect to awarded deferred common stock units: 

	Deferred Common Stock Units		Weighted-Average Grant Date Fair Value
Balance as of January 1, 2016 (Predecessor)	447,498		$	7.75
Granted	—		—
Converted	—		—
Canceled	(447,498	)	$	7.75
Balance as of December 31, 2016 (Successor)	—		$	—

Restricted Stock Units (RSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Activity of Awarded Restricted Stock Units

The following table summarizes activity for our most recent fiscal year with respect to awarded restricted stock units:

	Restricted Stock Units		Weighted-Average Grant Date Fair Value
Balance as of January 1, 2016 (Predecessor)	468,986		$	6.97
Granted	107,563		23.15
Vested	—		—
Forfeited	—		—
Canceled	(468,986	)	$	6.97
Balance as of December 31, 2016 (Successor)	107,563		$	23.15

Performance Based Restricted Stock Units (PBRSUs)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions

The ranges for the assumptions used in the Monte Carlo model for the Predecessor PBRSUs granted in the periods presented were as follows:

	Predecessor
	Year Ended December 31,
	2015	2014
Expected volatility	66.5% to 97.7%	52.6% to 72.3%
Dividend yield	0.0% to 0.0%	0.0% to 0.0%
Risk-free interest rate	0.01% to 1.31%	0.02% to 1.07%

Activity of Awarded Performance-based RSUs

The following table summarizes activity for our most recent fiscal year with respect to PBRSUs:

	Performance-Based Restricted Stock Units		Weighted-Average Fair Value
Balance as of January 1, 2016 (Predecessor)	941,097		$	9.19
Granted	—		—
Forfeited	—		—
Canceled	(941,097	)	$	9.19
Balance as of December 31, 2016 (Successor)	—		$	—