Employee Benefit Plans (Tables)

12 Months Ended

Dec. 27, 2014

Postretirement-Retirement Health Care Benefit Plan, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Reconciliation Of Post-retirement Health Care Benefit Obligation

		December 27,		December 28,
	2014		2013
Benefit obligation, beginning of year	$	1,330	$	1,348
Service costs		18		24
Interest cots		55		44
Actuarial loss (gain)		425		(60)
Benefits paid directly by the Company		(60)		(26)
Benefit obligation, end of the year	$	1,768	$	1,330

Schedule of Assumptions Used To Determine Post-retirement Health Care Benefit Obligation

	December 27,	December 28,
	2014	2013
Discount rate	3.8%	4.2%
Current year health care trend rate	8.1%	8.4%
Ultimate health care trend rate	4.7%	4.7%
Year of ultimate trend	2027	2027

German Defined Benefit Pension Plan [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule of Reconciliation Of Post-retirement Health Care Benefit Obligation

		December 27,		December 28,
	2014		2013
Benefit obligation, beginning of year	$	3,171	$	2,589
Service costs		177		144
Interest cots		119		111
Actuarial loss		1,769		(229)
Foreign exchange loss (gain)		(499)		556
Benefit obligation, end of the year	$	4,737	$	3,171

Assumptions Used To Determine Projected Benefit Obligations

	December 27,	December 28,
	2014	2013
Discount rate	2.2%	3.8%
Pension rate increase	2.0%	3.0%
Salary rate increase	3.0%	3.0%