Stock-Based Compensation

3 Months Ended

Mar. 31, 2018

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

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

STOCK-BASED COMPENSATION

We have a Management Incentive Plan (MIP) that is administered by the Compensation Committee of the Board of Directors. The Compensation Committee authorizes the grants of restricted stock (shares or units), performance share awards payable in stock based upon the attainment of specified performance goals and stock settled stock appreciation rights (SSARs). As of March 31, 2018, 2.4 million shares were available for grant under the 2013 Omnibus Plan.

	Quarter Ended March 31,
Dollar amounts in millions	2018			2017
Total stock-based compensation expense (cost of sales and general and administrative)	$	2.2		$	4.1
Income tax provision (benefit) related to stock-based compensation	$	(2.2	)	$	—
Impact on cash flow due to taxes paid related to net share settlement of equity awards	$	5.7		$	4.7

At March 31, 2018, $20.0 million of compensation cost related to unvested performance shares, restricted stock and SSARs attributable to future service had not yet been recognized.

Grants of awards

During the first three months of 2018, we granted 164,546 performance units at an average grant date fair value of $29.31 per share and 281,752 restricted stock awards (shares or units) at an average grant date fair value of $26.72 per share.