Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended			6 Months Ended		12 Months Ended	3 Months Ended	6 Months Ended
	Oct. 01, 2012	Jul. 01, 2012	Apr. 01, 2012	Jul. 01, 2012	Jul. 03, 2011	Dec. 31, 2011	Jul. 03, 2011 Communications cable operation in Phoenix, Arizona [Member]	Jul. 03, 2011 Communications cable operation in Phoenix, Arizona [Member]	Jul. 01, 2012 Trapeze Networks, Inc [Member]	Jul. 01, 2012 Standby letters of credit [Member]	Jul. 01, 2012 Bank Guaranties [Member]	Jul. 01, 2012 Surety Bonds [Member]
Loss Contingencies [Line Items]
Contingency accrual at carrying value										$ 6,400,000	$ 4,700,000	$ 1,700,000
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from Discontinued operations									152,100,000
Cash received on transaction with Trapeze network									136,900,000
Other income related to escrow									15,200,000
Interest and losses related to discontinued operations							300,000	500,000
Losses, including interest expense, related to discontinued operations, net of tax							200,000	300,000
Summary of Significant Accounting Policies (Textual) [Abstract]
Reporting Period	91 days	91 days	92 days	183 days	184 days	91 days
Impact of reclassifications to reported net income				0
Original maturity period of cash and cash equivalents				Three months or less
Fair value of cash and cash equivalents based on quoted market prices in active markets Level 1 valuation		$ 175,700,000		$ 175,700,000