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Net Income per Share Additional Information (Details) (USD $)
9 Months Ended
Nov. 27, 2013
Six Percent Tangible Equity Units [Member]
Sep. 30, 2014
Convertible Debt [Member]
Sep. 30, 2014
Minimum [Member]
Six Percent Tangible Equity Units [Member]
Sep. 30, 2014
Maximum [Member]
Six Percent Tangible Equity Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Interest Rate Percentage 6.00% 3.75%    
Debt And Equity Instruments, shares to be Issued     6,547,800 7,857,000
Conversion price of Convertible Notes   $ 24.49