Discontinued Operations (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2010	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on disposal of business unit		$ (64,000)	$ 898,000	$ 457,000	$ 1,915,000
(Benefit from) provision for income taxes on discontinued operations and dispositions		37,000	293,000	(358,000)	752,000
Photoflash Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceed from business divestiture	13,500,000
Pre-tax gain (loss) on disposal of business unit		0	974,000	493,000	1,966,000
Other Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on disposal of business unit		$ (64,000)	$ (76,000)	$ (36,000)	$ (51,000)