Business Segments (Summary Of Business Segment Information) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
External net sales	$ 94,909	$ 78,006	$ 71,745	$ 63,850	$ 85,611	$ 81,653	$ 79,227	$ 76,826	$ 308,510	$ 323,317	$ 333,633
Gross profit	20,910	$ 23,847	$ 14,676	$ 12,492	20,464	$ 15,697	$ 19,445	$ 20,277	71,925	75,883	87,234
Operating profit									46,380	47,902	61,704
Total assets	410,253				413,618				410,253	413,618	411,873
Depreciation and amortization									3,689	6,219	9,839
Capital expenditures									3,138	8,686	3,150
Housewares/ Small Appliances [Member]
Segment Reporting Information [Line Items]
External net sales									99,401	93,733	97,261
Gross profit									15,358	15,563	17,369
Operating profit									2,522	4,479	7,215
Total assets	241,992				268,007				241,992	268,007	232,524
Depreciation and amortization									1,250	1,161	1,150
Capital expenditures									804	7,974	1,574
Defense [Member]
Segment Reporting Information [Line Items]
External net sales									209,114	229,546	236,334
Gross profit									57,773	60,979	70,384
Operating profit									47,845	44,911	55,440
Total assets	148,476				132,636				148,476	132,636	162,869
Depreciation and amortization									2,138	4,835	8,511
Capital expenditures									2,155	676	1,301
Safety [Member]
Segment Reporting Information [Line Items]
External net sales									(5)	38	38
Gross profit									(1,206)	(659)	(519)
Operating profit									(3,987)	(1,488)	(951)
Total assets	$ 19,785				12,600				19,785	12,600	10,291
Depreciation and amortization									301	223	178
Capital expenditures									$ 179	36	275
Assets Held For Sale [Member]
Segment Reporting Information [Line Items]
Total assets					$ 375					$ 375	$ 6,189