XML 93 R77.htm IDEA: XBRL DOCUMENT
v3.20.4

Employee Retirement Plans - Pension Retirement Plans (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Nov. 30, 2019 | Oct. 31, 2019 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Other Comprehensive (Income) Loss, Pension Plan Termination Loss, after Tax and Reclassification Adjustment, Attributable to Parent | $ 6,380 |  | $ (6,380)
Douglas Dynamics LLC Pension Plan For Hourly Employees |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension funding contributions made |  | $ 3,245 |
Defined Benefit Plan, Annuities Purchased Amount | 4,767 |  |
Douglas Dynamics LLC Salaried Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Pension funding contributions made |  | $ 12,476 |
Defined Benefit Plan, Annuities Purchased Amount | $ 20,044 |  |

X
- Definition The amount of annuities purchased during the period under the defined benefit plan. + References No definition available. + Details
Name: | plow_DefinedBenefitPlanAnnuitiesPurchasedAmount
Namespace Prefix: | plow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for pension plan termination, attributable to parent. + References No definition available. + Details
Name: | plow_OtherComprehensiveIncomeLossPensionPlanTerminationLossAfterTaxAndReclassificationAdjustmentAttributableToParent
Namespace Prefix: | plow_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=plow_DouglasDynamicsLlcPensionPlanForHourlyEmployeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=plow_DouglasDynamicsLlcSalariedPensionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |