Deferred Compensation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014 item	Dec. 31, 2013
Deferred Compensation
Period preceding the year of termination for which the terminated participant will forfeit any positive amounts allocated to him or her	2 years
Multiplier of base compensation until which compensation earned is deferred	2
Percentage of account balance paid in cash in lump sum when account balance is more than the specified multiplier of the participant's base compensation	20.00%
Threshold limit for payment of vested account balances upon separation	$ 75
Number of equal annual installments in which vested account balances are paid upon separation when threshold limit is exceeded	5
Activity for the plan
Balance at beginning of year	756	911
Payments to current and former participants	(98)	(155)
Balance at end of year	658	756
Less current portion	(70)	(98)
Long Term balance at end of year	$ 588	$ 658

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Data Type:	xbrli:stringItemType
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Represents the multiplier of base compensation Until which compensation earned is deferred under the deferred compensation plan.

+ References

No definition available.

+ Details

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Data Type:	xbrli:pureItemType
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- Definition

Represents the number of equal annual installments in which vested account balances are paid upon separation when threshold limit is exceeded.

+ References

No definition available.

+ Details

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Namespace Prefix:	plow_
Data Type:	xbrli:integerItemType
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Period Type:	duration

- Definition

Represents the payments made to participants during the period under the deferred compensation plan.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the percentage of account balance paid in cash in lump sum when account balance is more than the specified multiplier of the participant's base compensation under the deferred compensation plan.

+ References

No definition available.

+ Details

Name:	plow_DeferredCompensationPlanPercentageOfAccountBalancePaidInCashInLumpSumWhenAccountBalanceIsMoreThanSpecifiedMultiplierOfBaseCompensationOfParticipant
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the period preceding the year of termination for which the terminated participant will forfeit any positive amounts allocated to him or her under the deferred compensation plan.

+ References

No definition available.

+ Details

Name:	plow_DeferredCompensationPlanPeriodPrecedingTerminationYearForWhichTerminatedParticipantWillForfeitPositiveAmountsAllocated
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Balance Type:	na
Period Type:	duration

- Definition

Represents the threshold limit for payment of vested account balances upon separation under the deferred compensation plan.

+ References

No definition available.

+ Details

Name:	plow_DeferredCompensationPlanThresholdLimitForPaymentOfVestedAccountBalancesUponSeparation
Namespace Prefix:	plow_
Data Type:	xbrli:monetaryItemType
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- Details

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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable within one year (or the operating cycle, if longer). Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 30

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20028-108363

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 25

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=6409733&loc=d3e19512-108361

+ Details

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Balance Type:	credit
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- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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