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Summary of Significant Accounting Policies (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Financing program      
Purchases of distributors financed $ 5,646plow_FinancingProgramPurchasesOfDistributorsFinanced $ 2,926plow_FinancingProgramPurchasesOfDistributorsFinanced $ 1,579plow_FinancingProgramPurchasesOfDistributorsFinanced
Uncollectible outstanding receivables 0plow_FinancingProgramUncollectibleAccountsReceivable 0plow_FinancingProgramUncollectibleAccountsReceivable  
Amount owed by distributors to third party financing company 1,889plow_FinancingProgramAmountOwedByDistributors 1,300plow_FinancingProgramAmountOwedByDistributors  
Repossessed inventory required to be repurchased $ 0plow_FinancingProgramRepossessedInventoryRequiredToBeRepurchased $ 0plow_FinancingProgramRepossessedInventoryRequiredToBeRepurchased $ 233plow_FinancingProgramRepossessedInventoryRequiredToBeRepurchased
Interest rate swap      
Interest Rate Swap      
Derivative, Fixed Interest Rate 6.335%us-gaap_DerivativeFixedInterestRate
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember		    
Interest rate swap | London Interbank Offered Rate (LIBOR) [Member]      
Interest Rate Swap      
Derivative, Basis Spread on Variable Rate 4.25%us-gaap_DerivativeBasisSpreadOnVariableRate
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember		    
Derivative, Floor Interest Rate 1.50%us-gaap_DerivativeFloorInterestRate
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember