Product Warranty Reserves (Tables)

6 Months Ended

Jun. 28, 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						Six Months Ended
	June 28, 2014			June 29, 2013			June 28, 2014			June 29, 2013
Product warranty reserve at beginning of period	$	2,001		$	1,289		$	1,850		$	1,297
Warranty reserve assumed in business combination	—			—			209			—
Warranty liabilities accrued	1,178			1,054			2,192			1,954
Warranty liabilities settled	(1,241		)	(947		)	(2,449		)	(1,777		)
Changes for pre-existing warranty liabilities	272			170			408			92
Product warranty reserve at end of period	$	2,210		$	1,566		$	2,210		$	1,566