Employee Benefit Plans (Tables)

12 Months Ended

Dec. 27, 2014

Postemployment Benefits [Abstract]

Schedule of Net Periodic Benefit Cost of Swiss Plan

Net periodic benefit cost of the Swiss Plan was as follows:

(in thousands)	2014			2013
Service cost	$	749		$	841
Interest cost		491			398
Expected return on assets		(343	)		(267	)
Net periodic costs	$	897		$	972

Schedule of Benefit Obligation, Fair Value of Plan Assets, Funded Status and Liability of Swiss Plan

The following table sets forth the projected benefit obligation, the fair value of plan assets, the funded status and the liability we have recorded in our consolidated balance sheet related to the Swiss Plan:

(in thousands)	2014			2013
Change in projected benefit obligation:
Benefit obligation at beginning of year	$	(23,850	)	$	(23,541	)
Service cost		(749	)		(841	)
Interest cost		(491	)		(398	)
Actuarial gain (loss)		(3,649	)		1,538
Participant contributions		(728	)		(751	)
Benefits paid		998			704
Foreign currency exchange adjustment		2,442			(561	)
Benefit obligation at end of year		(26,027	)		(23,850	)
Change in plan assets:
Fair value of plan assets at beginning of year		16,083			15,236
Return on assets, net of actuarial loss		652			(338	)
Employer contributions		728			751
Participant contributions		728			751
Benefits paid		(998	)		(704	)
Foreign currency exchange adjustment		(1,590	)		387
Fair value of plan assets at end of year		15,603			16,083
Net liability at December 27, 2014	$	(10,424	)	$	(7,767	)

Schedule of Weighted-Average Actuarial Assumptions to Determine Benefit Obligation and Net Periodic Benefit Cost

Weighted-average actuarial assumptions used to determine the benefit obligation under the Swiss Plan are as follows:

	2014			2013
Discount rate		1.3	%		2.3	%
Compensation increase		1.8	%		2.0	%

Weighted-average assumptions used to determine net periodic benefit cost of the Swiss Plan are as follows:

	2014			2013
Discount rate		2.3	%		1.8	%
Rate of return on Assets		2.3	%		1.8	%
Compensation increase		2.0	%		2.0	%

Schedule of Post-Retirement Benefit Obligation to Funded Status and Liability

The following table sets forth the post-retirement benefit obligation, funded status and the liability we have recorded in our consolidated balance sheets:

(in thousands)	2014			2013
Accumulated benefit obligation at beginning of year	$	2,021		$	2,366
Service cost		13			15
Interest cost		91			86
Actuarial (gain) loss		370			(386	)
Benefits paid		(67	)		(60	)
Accumulated benefit obligation at end of year		2,428			2,021
Plan assets at end of year		—			—
Funded status	$	(2,428	)	$	(2,021	)

Schedule of Stock Option Activity under Share-Based Compensation Plans

Stock option activity under our share-based compensation plans was as follows:

	2014					2013					2012
(in thousands, except per share data)	Shares			Wt. Avg. Ex. Price		Shares			Wt. Avg. Ex. Price		Shares			Wt. Avg. Ex. Price
Outstanding, beginning of year		3,086		$	11.93		3,113		$	12.62		3,112		$	13.01
Granted		10		$	12.58		470		$	9.83		437		$	10.50
Exercised		(237	)	$	8.43		(117	)	$	7.55		(73	)	$	8.26
Cancelled		(424	)	$	15.37		(380	)	$	16.37		(363	)	$	14.29
Outstanding, end of year		2,435		$	11.67		3,086		$	11.93		3,113		$	12.62
Options exercisable at year end		1,901		$	12.08		2,195		$	12.46		2,209		$	13.52

Schedule of Stock Options Outstanding and Exercisable

Information about stock options outstanding at December 27, 2014 is as follows (options in thousands):

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number Outstanding		Approximate Wt. Avg. Remaining Life (Years)		Wt. Avg. Ex. Price		Number Exercisable		Wt. Avg. Ex. Price
$7.32 - $10.98		1,402		6.2	$	8.86		898	$	8.22
$10.99 - $16.49		814		4.2	$	14.95		784	$	14.98
$16.50 - $24.74		214		0.7	$	17.31		214	$	17.31
$24.75 - $37.13		5		0.6	$	25.70		5	$	25.70
		2,435		5.0	$	11.67		1,901	$	12.08

Schedule of Restricted Stock Unit Activity under Share-Based Compensation Plans

Restricted stock unit activity under our share-based compensation plans was as follows:

	2014					2013					2012
(in thousands, except per share data)	Units			Wt. Avg. Fair Value		Units			Wt. Avg. Fair Value		Units			Wt. Avg. Fair Value
Outstanding, beginning of year		887		$	9.46		615		$	10.54		299		$	12.98
Granted		497		$	10.07		531		$	8.80		462		$	9.57
Released		(315	)	$	10.16		(223	)	$	10.86		(108	)	$	13.27
Cancelled		(43	)	$	9.41		(36	)	$	9.86		(38	)	$	13.92
Outstanding, end of year		1,026		$	9.54		887		$	9.46		615		$	10.54

Schedule of Performance Based Stock Unit Activity under Share-Based Compensation Plans

Performance based stock unit activity under our share-based compensation plans was as follows:

	2014					2013					2012
(in thousands, except per share data)	Units			Wt. Avg. Fair Value		Units			Wt. Avg. Fair Value		Units			Wt. Avg. Fair Value
Outstanding, beginning of year		238		$	9.32		122		$	9.89		—		$	—
Granted		208		$	11.34		158		$	9.03		129		$	9.89
Released		(38	)	$	9.52		(26	)	$	9.89		—		$	—
Cancelled		(74	)	$	9.59		(16	)	$	9.89		(7	)	$	9.89
Outstanding, end of year		334		$	10.49		238		$	9.32		122		$	9.89

Schedule of Weighted Average Assumptions to Value Share-Based Awards Granted

The following weighted average assumptions were used to value share-based awards granted:

Employee Stock Purchase Plan	2014			2013			2012
Dividend yield		2.4	%		2.6	%		2.4	%
Expected volatility		35.3	%		38.4	%		43.6	%
Risk-free interest rate		0.1	%		0.1	%		0.1	%
Expected term of options		0.5 years			0.5 years			0.5 years
Weighted-average grant date fair value per share	$	2.52		$	2.32		$	2.78

Employee Stock Options	2014			2013			2012
Dividend yield		2.0	%		2.6	%		2.1	%
Expected volatility		42.5	%		44.9	%		46.3	%
Risk-free interest rate		1.9	%		1.1	%		1.2	%
Expected term of options		5.9 years			6.4 years			6.3 years
Weighted-average grant date fair value per share	$	4.39		$	3.37		$	3.87
Restricted Stock Units		2014			2013			2012
Dividend yield		2.2	%		2.5	%		2.3	%
Performance Stock Units		2014			2013			2012
Dividend yield		2.2	%		2.5	%		2.3	%

Schedule of Reported Share-Based Compensation in Consolidated Financial Statements

Reported share-based compensation is classified in the consolidated financial statements as follows:

(in thousands)	2014			2013		2012
Cost of sales	$	491		$	390	$	417
Research and development		1,901			1,677		1,347
Selling, general and administrative		4,193			3,279		2,735
Total share-based compensation		6,585			5,346		4,499
Income tax benefit		(204	)		—		—
Total share-based compensation, net of tax	$	6,381		$	5,346	$	4,499