LINE OF CREDIT	9 Months Ended
Sep. 30, 2017
Line of Credit Facility [Abstract]
LINE OF CREDIT	NOTE 4 - LINE OF CREDIT The Company has a $40 million revolving line of credit with a bank. This facility is renewable annually and terminates on June 15, 2018. Borrowings under this facility bear interest at LIBOR (1.787% at September 30, 2017) plus 200 basis points. The Company is charged three-eighths of a percent (0.375%) per year on the unused portion. At September 30, 2017 and December 31, 2016, the Company was in compliance with the terms and covenants of the credit facility, which remains unused.

The entire disclosure for short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line.

No definition available.

Name:	rgr_LineOfCreditFacilitiesTextBlock
Namespace Prefix:	rgr_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration