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Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Employee Benefit Plans [Abstract]
Expenses related to matching employee contributions	$ 1.0	$ 0.9	$ 3.7	$ 3.1
Future match of defined contribution plans			1.0
Supplemental contributions total	$ 1.6	$ 1.5	5.3	$ 5.4
Supplemental contributions to the plan during the remainder of fiscal year			$ 1.6

X

- Definition

Amount of contributions made by the employer to the plan during the remainder of fiscal year.

+ References

No definition available.

+ Details

Name:	rgr_DefinedBenefitPlanContributionsByEmployerForRemainderOfFiscalYear
Namespace Prefix:	rgr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount represents the total cost estimated by the company for defined benefit plans.

+ References

No definition available.

+ Details

Name:	rgr_EstimatedCostForDefinedBenefitPlans
Namespace Prefix:	rgr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of administrative expense incurred by defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanAdministrativeExpenses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration