Supplementary Data (Schedule Of Restructuring Expense) (Details) (USD $)	3 Months Ended
Dec. 31, 2012	Sep. 30, 2012	Jul. 01, 2012	Apr. 01, 2012	Dec. 31, 2011	Sep. 25, 2011	Jun. 26, 2011	Mar. 27, 2011
Quarterly Financial Data [Abstract]
Restructuring expense	$ 19,000	$ 9,200	$ 6,200	$ 11,500	$ 1,600	$ 12,400	$ 13,600	$ 23,000

Adjustment to remove noncash portion of restructuring costs and include cash payments when calculating cash flows from operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Name:	us-gaap_RestructuringCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration