The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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

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-Name Regulation S-X (SX)

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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-Article 5

+ Details

Stock-Based Compensation Expense (Details 3) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2013	Jul. 02, 2012	Jul. 01, 2013	Jul. 02, 2012
Restricted stock shares
Stock-based employee compensation
Forfeitures (in shares)	250,000	2,075	268,900	2,125
Value of the forfeited shares	$ 0.7		$ 0.7
Restricted stock shares \| Members of the Board of Directors
Stock-based employee compensation
Issued (in shares)	44,640	43,103
Value of the shares and options for the grants made during the period			$ 0.1	0.2
Restricted stock units
Stock-based employee compensation
Conversion of units into common stock (in shares)		91,250