Related-Party Transactions - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2025 USD ($) Supplier	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Related Party Transaction [Line Items]
Purchases from companies and from PTI prior to full acquisition \| $	$ 24.8	$ 18.4	$ 22.7
Joint Venture
Related Party Transaction [Line Items]
Number of suppliers with company partners Joint Venture	1
Minority interests in number of suppliers	2

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Dorman Products, Inc. 10-K