Stock-Based Compensation

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

The Company’s stock-based compensation expense for the three and six months ended June 30, 2020 and 2019 included performance restricted stock units ("PRSUs"), non-qualified stock options, restricted stock units ("RSUs") and deferred stock units ("DSUs"). A summary of the Company’s stock-based compensation expense is presented in the following table:


	Three Months Ended June 30,						Six Months Ended June 30,
(in millions)	2020		2019		2020		2019
PRSU expense	$	0.9	$	0.4	$	1.2	$	0.7
Option expense	1.2		1.2		2.4		2.4
RSU/DSU expense	5.4		5.0		11.2		10.1
Total stock-based compensation expense	$	7.5	$	6.6	$	14.8	$	13.2

The Company grants PRSUs to executive officers and certain members of management. During the first quarter of 2020, the Company granted PRSUs as a component of the long-term incentive plan. Actual payout under the PRSUs is dependent upon the achievement of certain financial goals.

During 2017, the Company granted executive officers and certain members of management PRSUs if the Company achieves a certain level of adjusted earnings before interest, tax, depreciation and amortization as defined in the Company’s Credit Agreement ("Adjusted EBITDA per Credit Facility") during four consecutive fiscal quarters as described below (the "2019 Aspirational Plan PRSUs"). The 2019 Aspirational Plan PRSUs will vest based on the highest Adjusted EBITDA per Credit Facility in any four consecutive fiscal quarter period ending between (and including) March 31, 2018 and December 31, 2019 (the “First Designated Period”). At the end of the First Designated Period, the Adjusted EBITDA per Credit Facility targets were not met and one-half of the total 2019 Aspirational Plan PRSUs were forfeited.

The remaining one-half of the total 2019 Aspirational Plan PRSUs will vest based on the highest Adjusted EBITDA per Credit Facility in any four consecutive fiscal quarter period ending between (and including) March 31, 2020 and December 31, 2020 (the "Second Designated Period"). If the highest Adjusted EBITDA per Credit Facility in the Second Designated Period is $600.0 million then 66% of the remaining 2019 Aspirational Plan PRSUs will vest; if the Adjusted EBITDA per Credit Facility is $650.0 million or more 100% will vest; if Adjusted EBITDA per Credit Facility is between $600.0 million and $650.0 million then a pro rata portion will vest; and if Adjusted EBITDA per Credit Facility is below $600.0 million then all of the remaining 2019 Aspirational Plan PRSUs will be forfeited.

The Company did not record any stock-based compensation expense related to the 2019 Aspirational Plan PRSUs during the three and six months ended June 30, 2020, as it was not probable that the Company would achieve the specified performance target for the Second Designated Period. The Company will continue to evaluate the probability of achieving the performance condition in future periods and record the appropriate expense if necessary. Based on the price of the Company’s common stock on the grant date, the total unrecognized compensation expense related to this award if the performance target is met for the Second Designated Period would range from $33.0 million to $49.5 million, which would be a non-cash expense over the remaining service period if achievement of the performance condition becomes probable.