Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	3 Months Ended
Mar. 29, 2015	Mar. 30, 2014	Dec. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accrued customer incentives and rebates	$ 10,500,000us-gaap_CustomerRefundLiabilityCurrent		$ 12,500,000us-gaap_CustomerRefundLiabilityCurrent
Cash dividend declared (USD per share)	$ 0.50	$ 0
Dividend payable	21,384,000us-gaap_DividendsPayableCurrent		0us-gaap_DividendsPayableCurrent
Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend payable	$ 400,000

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Liabilities

-URI http://asc.fasb.org/extlink&oid=6509677

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant