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Earnings per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 29 Months Ended
Apr. 03, 2016
Mar. 29, 2015
Sep. 30, 2015
Jul. 27, 2015
Apr. 30, 2013
Net (loss) income          
(Loss) Income $ 16.2 $ 11.6      
Shares          
Shares (in shares) 34,400,000 35,100,000      
Per Share Amount          
NET INCOME PER SHARE (in dollars per share) $ 0.47 $ 0.33      
Dilutive securities, principally common stock options          
Common stock equivalents (in shares) 100,000 100,000      
Net (loss) income          
Net (loss) income $ 16.2 $ 11.6      
Weighted average number of shares:          
Shares (in shares) 34,500,000 35,200,000      
Per Share Amount          
Net income (in dollars per share) $ 0.47 $ 0.33      
Shares repurchased          
Options to purchase shares of Class A common stock 200,000 300,000      
Total value of shares of the entity's Class A common stock authorized to be repurchased       $ 100.0 $ 90.0
Number of shares repurchased 267,931 164,000      
Cost of shares repurchased $ 12.5 $ 9.4      
April 30, 2013          
Shares repurchased          
Number of shares repurchased   164,000      
Cost of shares repurchased   $ 9.4 $ 90.0    
July 27, 2015          
Shares repurchased          
Number of shares repurchased 267,931        
Cost of shares repurchased $ 12.5        
Remaining authorized repurchase amount $ 70.3