XML 39 R24.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 30, 2017
Accounting Policies [Abstract] |
Estimated Useful Lives by Major Asset | Estimated useful lives by major asset category are as follows:
Buildings and building improvements |  | 10 to 39 years
Machinery, equipment and tooling |  | 3 to 10 years
Software and computer equipment |  | 3 to 10 years
Furniture, fixtures and leasehold improvements |  | 3 to 15 years

X
- Definition Plant and equipment estimated useful life. + References No definition available. + Details
Name: | dorm_PropertyPlantAndEquipmentEstimatedUsefulLifeTableTextBlock
Namespace Prefix: | dorm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration