Earnings Per Share ("EPS") (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Calculations of basic and diluted earnings per share

The calculations of basic and diluted EPS are as follows:

	Three Months Ended March 31, 2019							Three Months Ended March 31, 2018
	Net Income Attributable to Kraton			Weighted Average Shares Outstanding		Earnings Per Share		Net Income Attributable to Kraton			Weighted Average Shares Outstanding		Earnings Per Share
	(In thousands, except per share data)
Basic:
As reported	$	12,668		31,956				$	22,072		31,771
Amounts allocated to unvested restricted shares	(128		)	(323	)			(368		)	(530	)
Amounts available to common stockholders	12,540			31,633		$	0.40	21,704			31,241		$	0.69
Diluted:
Amounts allocated to unvested restricted shares	128			323				368			530
Non participating share units	—			205				—			280
Stock options added under the treasury stock method	—			63				—			330
Amounts reallocated to unvested restricted shares	(127		)	(323	)			(361		)	(530	)
Amounts available to stockholders and assumed conversions	$	12,541		31,901		$	0.39	$	21,711		31,851		$	0.68