Share-Based Compensation (Tables)

12 Months Ended

Dec. 27, 2019

Share-based Payment Arrangement, Noncash Expense [Abstract]

Stock-Based Compensation Expense Included in Selling, General and Administrative Expenses Related to Stock Options and Restricted Stock Awards

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

	Year ended
Types of Awards	December 27, 2019		December 28, 2018		December 29, 2017
Stock options	$	—	$	0.1	$	0.5
RSUs/PSUs	7.4		10.3		10.7
RSAs	1.0		1.1		0.9
Total	$	8.4	$	11.5	$	12.1

Restricted Stock Units Award Activity

The following table lists the RSA for the years ended December 27, 2019 and December 28, 2018:

Date of Award	Shares of Restricted Stock Awarded		Price Per Share
Awards for the year ended 2019:
May 1, 2019	$	2,830	29.44
January 2, 2019	$	30,891	28.32
Awards for the year ended 2018:
August 2, 2018	$	1,687	49.38
January 2, 2018	$	21,304	46.93
Awards for the year ended 2017:
January 3, 2017	$	14,294	61.21

Schedule of RSUs / PSUs Awarded

The following table lists the various RSUs/PSUs awarded under the 2014 Plan and Prior Plans for the years ended December 27, 2019 and December 28, 2018 (U.S. dollars in millions except share and per share data):

15. Share-Based Compensation (continued)

Date of Award	Type of Award	Units Awarded	Price Per Share
Awards for the year ended 2019:
July 31, 2019	PSU	4,250	30.33
March 25, 2019	RSU	5,000	26.55
February 20, 2019	PSU	85,000	27.71
February 20, 2019	RSU	133,750	27.71
Awards for the year ended 2018:
June 25, 2018	RSU	2,000	44.78
February 21, 2018	RSU	125,000	46.35
February 21, 2018	PSU	85,000	46.35
Awards for the year ended 2017:
August 2, 2017	RSU	48,700	49.75
February 22, 2017	PSU	100,000	56.52
February 22, 2017	RSU	50,000	56.52

Schedule of RSUs / PSUs Activity

The following table summarizes RSUs/PSUs activity for the years ended December 27, 2019, December 28, 2018, December 29, 2017:

	Number of Shares		Weighted Average Grant Date Fair Value
RSUs/PSUs outstanding at January 1, 2017	932,036		$	36.09
Granted	208,743		54.17
Converted	(336,112	)	34.91
Canceled	(43,515	)	43.77
RSUs/PSUs outstanding at December 29, 2017	761,152		41.13
Granted	223,531		46.10
Converted	(279,440	)	41.31
Canceled	(21,948	)	50.40
RSUs/PSUs outstanding at December 28, 2018	683,295		42.39
Granted	230,037		27.83
Converted	(384,717	)	37.65
Canceled	(69,339	)	42.93
RSUs/PSUs outstanding at December 27, 2019	459,276		38.99
Vested at December 29, 2017	235,332		$	26.49
Vested at December 28, 2018	249,767		$	31.28
Vested at December 27, 2019	52,903		$	32.65

Summary of RSUs / PSUs Outstanding

Information about RSUs/PSUs outstanding at December 27, 2019 was as follows:

Grant Date Market Value		Outstanding	Outstanding Intrinsic Value		Vested	Vested Intrinsic Value
$	27.71	77,347	$	0.6	—	$	—
$	27.71	100,250	0.7		—	—
$	26.55	4,018	—		—	—
$	30.33	4,269	—		—	—
$	44.78	1,216	—		—	—
$	46.35	66,553	—		—	—
$	46.35	45,507	—		—	—
$	40.03	3,133	—		—	—
$	56.52	40,678	—		4,601	—
$	56.52	20,643	—		—	—
$	59.83	20,729	—		—	—
$	49.75	14,721	—		—	—
$	38.99	12,514	—		11,034	—
$	38.99	10,428	—		—	—
$	33.44	10,047	—		10,047	—
$	33.44	—	—		—	—
$	25.52	10,735	0.1		10,733	0.1
$	26.52	10,929	0.1		10,928	0.1
$	24.68	5,559	0.1		5,560	0.1
		459,276	$	1.6	52,903	$	0.3