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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, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net Sales	$ 105,139	$ 94,999	$ 96,329	$ 114,039	$ 121,121	$ 114,945	$ 128,411	$ 131,159	$ 410,506	$ 495,635	$ 522,256
Income (Loss) Before Income Taxes									43,027	68,714	77,646
Identifiable Assets	348,961				335,532				348,961	335,532	284,318
Depreciation									29,024	31,625	33,819
Payments to Acquire Property, Plant, and Equipment									20,296	10,541	33,596
Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales									(18,425)	(22,946)	(24,436)
Firearms [Member]
Segment Reporting Information [Line Items]
Net Sales									406,326	490,607	517,701
Income (Loss) Before Income Taxes									40,814	70,311	77,368
Identifiable Assets	163,792				166,975				163,792	166,975	206,091
Depreciation									27,149	29,542	31,701
Payments to Acquire Property, Plant, and Equipment									19,570	9,689	32,710
Unaffiliated Castings [Member]
Segment Reporting Information [Line Items]
Net Sales									4,180	5,028	4,555
Income (Loss) Before Income Taxes									(797)	(2,240)	(53)
Identifiable Assets	11,332				10,850				11,332	10,850	12,524
Depreciation									1,875	2,083	2,118
Payments to Acquire Property, Plant, and Equipment									726	852	886
Unaffiliated Castings [Member] | Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net Sales									18,425	22,946	24,436
Unaffiliated Castings [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales									22,605	27,974	28,991
Corporate [Member]
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes									3,010	643	331
Identifiable Assets	$ 173,837				$ 157,707				$ 173,837	$ 157,707	$ 65,703

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