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Net Income per Share - Share Repurchase Programs (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015	Mar. 21, 2016	Oct. 23, 2014
Share Repurchase Program
Share repurchase program, amount authorized to be repurchased					$ 20.0	$ 30.0
Number of shares repurchased and retired	672,795	118,900	672,795	263,800
Average repurchase price per share (in dollars per share)	$ 24.09	$ 28.90	$ 24.09	$ 30.23
Amount available for future repurchases	$ 11.9		$ 11.9

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- Definition

No definition available

+ References

No definition available.

+ Details

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- Definition

Represents the average price per share of the shares repurchased by the entity during the reporting period.

+ References

No definition available.

+ Details

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

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