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
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Property, plant and equipment      
Property, plant and equipment, gross $ 98,984us-gaap_PropertyPlantAndEquipmentGross $ 81,803us-gaap_PropertyPlantAndEquipmentGross  
Accumulated depreciation and amortization (47,641)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (49,781)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment  
Total property, plant and equipment 51,343us-gaap_PropertyPlantAndEquipmentNet 32,022us-gaap_PropertyPlantAndEquipmentNet  
Depreciation expense 4,260us-gaap_Depreciation 4,317us-gaap_Depreciation 3,929us-gaap_Depreciation
Land and improvements      
Property, plant and equipment      
Property, plant and equipment, gross 2,418us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandAndLandImprovementsMember
3,800us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandAndLandImprovementsMember
 
Buildings and improvements      
Property, plant and equipment      
Property, plant and equipment, gross 31,245us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingAndBuildingImprovementsMember
33,655us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingAndBuildingImprovementsMember
 
Machinery and equipment      
Property, plant and equipment      
Property, plant and equipment, gross 19,716us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
18,209us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
 
Furniture and fixtures      
Property, plant and equipment      
Property, plant and equipment, gross 18,311us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
17,884us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
 
Computer software and hardware      
Property, plant and equipment      
Property, plant and equipment, gross $ 27,294us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= natr_ComputerSoftwareAndHardwareMember
$ 8,255us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= natr_ComputerSoftwareAndHardwareMember