Product Warranty Reserves (Tables)

9 Months Ended

Sep. 27, 2014

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

The following is a summary of the Company's product warranty activity.

	Three Months Ended						Nine Months Ended
	September 27, 2014			September 28, 2013			September 27, 2014			September 28, 2013
Product warranty reserve at beginning of period	$	2,210		$	1,566		$	1,850		$	1,297
Warranty reserve assumed in business combination	—			—			209			—
Warranty liabilities accrued	1,180			1,225			3,372			3,179
Warranty liabilities settled	(1,266		)	(1,111		)	(3,715		)	(2,888		)
Changes for pre-existing warranty liabilities	204			40			612			132
Product warranty reserve at end of period	$	2,328		$	1,720		$	2,328		$	1,720