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Subsequent Events (Details) (Subsequent Event [Member], USD $)	Feb. 11, 2013
Subsequent Event [Member]
Subsequent Event [Line Items]
Dividend authorized	$ 0.404

X

- Definition

Dividends Payable Amount Per Share Subsequent Event

+ References

No definition available.

+ Details

Name:	rgr_DividendsPayableAmountPerShareSubsequentEvent
Namespace Prefix:	rgr_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

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