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Stock Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended 12 Months Ended
Feb. 08, 2012
Jul. 03, 2015
Jan. 02, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average period, Common stock   2 years 6 months  
Number of shares granted subject to vesting requirements   0  
Shares subject to vesting requirements   264,474  
Nonvested weighted average grant-date fair value, Common stock   $ 7.54  
Compensation expense related to common stock subject to vesting requirements   $ 1.2  
Chief Executive Officer And Chief Operating Officer [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards vested     50.00%
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock units granted   693,612  
Weighted average grant-date fair value   $ 8.13  
Weighted average period, Restricted stock units   2 years 2 months 12 days  
Restricted stock units outstanding   2,189,972  
Nonvested weighted average grant-date fair value   $ 6.60  
Compensation expenses related to unvested restricted stock unit based awards   $ 9.2  
Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average grant-date fair value $ 1.31    
Performance based stock option grant, Exercise price $ 4.00    
Performance based stock option grant 2,916,563    
Performance Shares [Member] | Chief Executive Officer [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance based stock option grant 1,912,500    
Performance Shares [Member] | Chief Operating Officer [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance based stock option grant 1,004,063