Quarterly report pursuant to Section 13 or 15(d)

Property, plant and equipment (Details)

v2.4.1.9
Property, plant and equipment (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Property, plant and equipment    
Total property, plant and equipment $ 73,013us-gaap_PropertyPlantAndEquipmentGross $ 71,988us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation (35,365)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment (34,442)us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Net property, plant and equipment 37,648us-gaap_PropertyPlantAndEquipmentNet 37,546us-gaap_PropertyPlantAndEquipmentNet
Land    
Property, plant and equipment    
Total property, plant and equipment 1,500us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
1,500us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
Land improvements    
Property, plant and equipment    
Total property, plant and equipment 2,292us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember
2,292us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandImprovementsMember
Leasehold Improvements    
Property, plant and equipment    
Total property, plant and equipment 499us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
499us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LeaseholdImprovementsMember
Buildings    
Property, plant and equipment    
Total property, plant and equipment 22,081us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
21,918us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
Machinery and equipment    
Property, plant and equipment    
Total property, plant and equipment 31,675us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
31,780us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
Furniture and fixtures    
Property, plant and equipment    
Total property, plant and equipment 10,195us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
10,070us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_FurnitureAndFixturesMember
Mobile equipment and other    
Property, plant and equipment    
Total property, plant and equipment 2,076us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= plow_MobileEquipmentAndOtherMember
1,999us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= plow_MobileEquipmentAndOtherMember
Construction-in-process    
Property, plant and equipment    
Total property, plant and equipment $ 2,695us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember
$ 1,930us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember