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Operating Segment Information (Schedule of Operating Segment Financial Information) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net Sales	$ 121,121	$ 114,945	$ 128,411	$ 131,159	$ 118,230	$ 104,817	$ 131,854	$ 167,355	$ 495,635	$ 522,256	$ 664,328
Income (Loss) Before Income Taxes									68,714	77,646	135,921
Identifiable Assets	335,532				284,318				335,532	284,318	346,879
Depreciation									31,625	33,819	34,698
Payments to Acquire Property, Plant, and Equipment									10,541	33,596	35,215
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales									(22,946)	(24,436)	(36,779)
Firearms [Member]
Segment Reporting Information [Line Items]
Net Sales									490,607	517,701	658,433
Income (Loss) Before Income Taxes									70,311	77,368	136,390
Identifiable Assets	166,975				206,091				166,975	206,091	242,758
Depreciation									29,542	31,701	32,010
Payments to Acquire Property, Plant, and Equipment									9,689	32,710	33,455
Unaffiliated Castings [Member]
Segment Reporting Information [Line Items]
Net Sales									5,028	4,555	5,895
Income (Loss) Before Income Taxes									(2,240)	(53)	(1,237)
Identifiable Assets	10,850				12,524				10,850	12,524	16,096
Depreciation									2,083	2,118	2,688
Payments to Acquire Property, Plant, and Equipment									852	886	1,760
Unaffiliated Castings [Member] | Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales									22,946	24,436	36,779
Unaffiliated Castings [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales									27,974	28,991	42,674
Corporate [Member]
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes									643	331	768
Identifiable Assets	$ 157,707				$ 65,703				$ 157,707	$ 65,703	$ 88,025

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