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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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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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.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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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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Cost incurred during the reporting period in transporting goods and services to customers. Includes freight-out costs.

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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Advertising expenses	$ 2.9	$ 3.0	$ 3.6
Shipping costs	5.7	6.4	7.1
Research and development	$ 8.7	$ 8.5	$ 10.0
Tools, Dies and Molds [Member]
Property, Plant and Equipment [Line Items]
Useful life	3 years
Building [Member]
Property, Plant and Equipment [Line Items]
Useful life	15 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful life	7 years
Sales [Member] \| Unaffiliated Castings [Member]
Segment Reporting Information [Line Items]
Percentage of sales	1.00%
Sales [Member] \| Firearms [Member]
Segment Reporting Information [Line Items]
Percentage of sales	99.00%
Sales [Member] \| Firearms [Member] \| Non-US [Member]
Segment Reporting Information [Line Items]
Percentage of sales	3.00%