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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 02, 2018
Segment Reporting Information [Line Items]
Advertising expenses	$ 3.1	$ 2.9	$ 3.0
Shipping costs	4.8	5.7	6.4
Research and development	$ 9.8	$ 8.7	$ 8.5
Effective income tax rate	32.80%	35.60%	35.40%
Subsequent Event [Member]
Segment Reporting Information [Line Items]
Contract liability				$ 7.0
Accounting Standards Update 2016-09 [Member]
Segment Reporting Information [Line Items]
Impact on effective income tax rate	2.00%
Scenario Previously Reported [Member]
Segment Reporting Information [Line Items]
Impact on current deferred income tax assets		$ 8.8
Impact on noncurrent deferred income tax liabilities		$ 8.5
Tools, Dies and Molds [Member]
Segment Reporting Information [Line Items]
Useful life	3 years
Building [Member]
Segment Reporting Information [Line Items]
Useful life	15 years
Machinery and Equipment [Member]
Segment Reporting Information [Line Items]
Useful life	7 years
Unaffiliated Castings [Member] | Sales [Member]
Segment Reporting Information [Line Items]
Percentage of sales	1.00%
Firearms [Member] | Sales [Member]
Segment Reporting Information [Line Items]
Percentage of sales	99.00%
Firearms [Member] | Sales [Member] | Non-US [Member]
Segment Reporting Information [Line Items]
Percentage of sales	4.00%

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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