Share-Based Compensation (Tables)

The following table summarizes our share-based compensation expense (benefit) recognized for the periods presented:



	Successor				Predecessor
	Year Ended		September 13 Through		January 1 Through			Year Ended
	December 31,		December 31,		September 12,			December 31,
	2017		2016		2016			2015
Equity-classified awards	$	3,809	$	81	$	1,511		$	4,540
Liability-classified awards	—		—		(19		)	(711		)
	$	3,809	$	81	$	1,492		$	3,829

The ranges for the assumptions used in the Black-Scholes-Merton pricing formula for the Predecessor stock options granted in the year ended December 31, 2015 were as follows:



Expected volatility	64.6% to 69.4%
Dividend yield	0.00% to 0.00%
Expected life	3.5 to 4.6 years
Risk-free interest rate	0.87% to 1.54%

The ranges for the assumptions used in the Monte Carlo model for the PRSUs granted during 2017 are presented as follows:



Expected volatility	59.63% to 62.18%
Dividend yield	0.0% to 0.0%
Risk-free interest rate	1.44% to 1.51%

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



	Performance Restricted Stock Units	Weighted-Average Fair Value
Balance as of January 1, 2017	—	$	—
Granted	98,526	57.81
Forfeited	—	—
Canceled	—	$	—
Balance as of December 31, 2017	98,526	$	57.81

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



	Restricted Stock Units		Weighted-Average Grant Date Fair Value
Balance as of January 1, 2017	107,563		$	23.15
Granted	197,418		48.41
Vested	(35,854	)	23.15
Forfeited	(9,137	)	51.71
Balance as of December 31, 2017	259,990		$	41.32

The ranges for the assumptions used in the Monte Carlo model for the Predecessor PBRSUs granted in 2015 are presented as follows:



Expected volatility	66.5% to 97.7%
Dividend yield	0.0% to 0.0%
Risk-free interest rate	0.01% to 1.31%