Share-Based Compensation (Tables)

6 Months Ended

Jun. 28, 2019

Share-based Payment Arrangement, Noncash Expense [Abstract]

Stock-based compensation expense included in selling, general and administrative expenses

Stock-based compensation expense related to stock options, restricted stock awards ("RSAs"), restricted stock units ("RSUs") and performance stock units ("PSUs") is included in selling, general and administrative expenses in the accompanying Consolidated Statements of Operations and is comprised as follows (U.S. dollars in millions): 

	Quarter ended				Six months ended
	June 28, 2019		June 29, 2018		June 28, 2019		June 29, 2018
Stock options	$	—	$	—	$	—	$	0.1
RSUs/PSUs	1.8		2.3		5.1		5.9
RSAs	0.1		—		1.0		1.0
Total	$	1.9	$	2.3	$	6.1	$	7.0

Restricted stock awards and related compensation expense

The following table lists RSAs awarded under the 2014 plan for the six months ended June 28, 2019 and June 29, 2018:

Date of award	Shares of restricted stock awarded	Price per share
May 1, 2019	2,830	$	29.44
January 2, 2019	30,891	28.32
January 2, 2018	21,304	46.93

RSU and PSUs awarded

The following table lists the various RSUs and PSUs awarded under the 2014 Plan for the six months ended June 28, 2019 and June 29, 2018 (U.S. dollars in millions, except share and per share data):

Date of award		Type of award	Units awarded	Price per share
March 25, 2019		RSU	5,000	$	26.55
February 20, 2019		PSU	85,000	27.71
February 20, 2019		RSU	133,750	27.71
February 21, 2018	(1)	PSU	85,000	46.35
February 21, 2018		RSU	125,000	46.35

⁽¹⁾ The 2018 PSU's were forefeited as a result of not meeting the performance metric.