Annual report pursuant to Section 13 and 15(d)

Property, Plant, and Equipment (Details)

v2.4.1.9
Property, Plant, and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 27, 2014
Dec. 28, 2013
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 162,491us-gaap_PropertyPlantAndEquipmentGross $ 141,423us-gaap_PropertyPlantAndEquipmentGross
Less: Accumulated depreciation (91,375)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (86,484)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Construction in progress 6,600us-gaap_ConstructionInProgressGross 20,792us-gaap_ConstructionInProgressGross
Total 77,716us-gaap_PropertyPlantAndEquipmentNet 75,731us-gaap_PropertyPlantAndEquipmentNet
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 94,702us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
92,549us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
Office furniture and equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 9,417us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OfficeEquipmentMember
7,969us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_OfficeEquipmentMember
Buildings    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 45,604us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
30,771us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
Leasehold and land improvements    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 2,664us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdsAndLeaseholdImprovementsMember
2,644us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdsAndLeaseholdImprovementsMember
Land    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 10,104us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
$ 7,490us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember