Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

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

Summary of the Company's Stock Option Activity

A summary of the Company’s stock option activity is as follows ( the weighted average exercise price per share has been adjusted for the Spin-Off and November 2017 1-for-4 reverse stock split):

	Shares			Weighted Average Exercise Price		Aggregate Intrinsic Value
Options outstanding as of January 1, 2016		1,397,571		$	15.51
Granted		439,741			17.20
Exercised		(712,514	)		13.09
Forfeited		(97,842	)		16.38
Cancelled		(61,056	)		18.68
Options outstanding as of December 31, 2016		965,900			17.76
Granted		273,800			25.68
Exercised		(258,699	)		19.86
Forfeited		(78,100	)		20.16
Cancelled		(26,536	)		27.29
Options outstanding as of December 31, 2017		876,365		$	19.13	$	17.8
Options exercisable as of:
December 31, 2017		372,206		$	15.97	$	8.7

Schedule of the Assumptions Used to Estimate the Fair Value of Each Option Grant

The fair value of each option grant was estimated at the date of grant using the Black-Scholes option-pricing method with the following assumptions:

	2017			2016			2015
Expected Life (years)		6.5			6.5			6.0
Risk-free Interest rate		2.2	%		1.6	%		1.8	%
Expected volatility		45.0	%		45.0	%		56.0	%
Expected dividend yield		—	%		—	%		0.3	%

Restricted Stock

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

Schedule of Nonvested Share Activity

A summary of activity for restricted stock awards for the year ended December 31, 2017 is as follows:

	Shares			Weighted Average Grant Date Fair Value
Unvested as of January 1, 2017		39,028		$	86.92
Granted		—			—
Vested		(11,058	)		86.92
Forfeited		(5,544	)		86.92
Unvested as of December 31, 2017		22,426		$	86.92

Performance Shares

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

Schedule of Nonvested Share Activity

A summary of activity for restricted stock units for the year ended December 31, 2017 is as follows:

	Shares			Weighted Average Grant Date Fair Value
Unvested as of January 1, 2017		465,117		$	44.08
Granted		267,902			25.87
Vested		(72,891	)		96.59
Forfeited		(66,029	)		27.72
Unvested as of December 31, 2017		594,099		$	29.18