Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013
Disclosure Accrued Liabilities [Abstract]
Payroll-related liabilities	$ 8,301		$ 6,166
Product warranty accrual	3,152	3,487	4,215	5,563	5,193	5,411
Purchase order commitments and receipts	2,019		2,569
Pension benefit liabilities	1,991		1,912
Professional fees payable	1,663		1,933
Freight accrual	304		503
Income taxes payable	313		162
Restructuring costs payable	442		1,050
Customer deposits	852		375
Value added taxes payable	413		332
Other	1,609		1,307
Accrued liabilities	$ 21,059		$ 20,524