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Share-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Apr. 28, 2017
Mar. 29, 2017
Apr. 29, 2016
Mar. 30, 2016
Oct. 28, 2017
Oct. 29, 2016
Oct. 28, 2017
Oct. 29, 2016
Jan. 29, 2017
Disclosure of share-based compensation information under stock plans                  
Share-based compensation expense         $ 4,260 $ 3,719 $ 12,410 $ 12,768  
Share-Based Compensation, Additional Disclosures                  
Unrecognized compensation cost related to nonvested stock options         4,300   $ 4,300    
Weighted average fair values of stock options granted during the period (in dollars per share)             $ 1.57 $ 3.53  
Granted (in shares)   1,283,175   616,450          
Accounting Standards Update 2016-09                  
Share-Based Compensation, Additional Disclosures                  
Cumulative adjustment to reduce retained earnings as a result of adoption of guidance which allows entities to account for forfeitures as they occur                 $ 300
Employee Stock Purchase Plan                  
Disclosure of share-based compensation information under stock plans                  
Share-based compensation expense         31 23 $ 110 $ 114  
Stock options                  
Disclosure of share-based compensation information under stock plans                  
Share-based compensation expense         571 520 $ 1,761 1,654  
Share-Based Compensation, Additional Disclosures                  
Weighted average period for recognition of unrecognized compensation cost (in years/months/days)             1 year 8 months 10 days    
Stock awards or units                  
Disclosure of share-based compensation information under stock plans                  
Share-based compensation expense         3,658 $ 3,176 $ 10,539 $ 11,000  
Share-Based Compensation, Additional Disclosures                  
Unrecognized compensation cost related to nonvested stock awards/units         $ 33,400   $ 33,400    
Weighted average period for recognition of unrecognized compensation cost (in years/months/days)             1 year 8 months 10 days    
Number of Units                  
Granted (in shares)   707,675   442,000          
Performance-based or market-based units                  
Number of Units                  
Granted (in shares) 1,056,042   602,816            
Performance-based units                  
Number of Units                  
Nonvested at the beginning of the period (in shares)             787,849    
Granted (in shares)             818,416    
Vested (in shares)             (193,240)    
Forfeited (in shares)             (6,757)    
Nonvested at the end of the period (in shares)         1,406,268   1,406,268    
Weighted Average Grant Date Fair Value                  
Nonvested at the beginning of the period (in dollars per share)             $ 19.17    
Granted (in dollars per share)             11.17    
Vested (in dollars per share)             20.57    
Forfeited (in dollars per share)             18.35    
Nonvested at the end of the period (in dollars per share)         $ 14.32   $ 14.32    
Performance units | Vesting, Tranche One                  
Share-Based Compensation, Additional Disclosures                  
Vesting period (in years)             1 year    
Performance units | Vesting, annual vesting periods after initial vesting period | Minimum                  
Share-Based Compensation, Additional Disclosures                  
Vesting period (in years)             2 years    
Performance units | Vesting, annual vesting periods after initial vesting period | Maximum                  
Share-Based Compensation, Additional Disclosures                  
Vesting period (in years)             3 years    
Target performance units                  
Share-Based Compensation, Additional Disclosures                  
Vesting period (in years)             3 years    
Target performance units | Minimum                  
Share-Based Compensation, Additional Disclosures                  
Vesting rights based on the satisfaction of certain performance or market-based criteria (as a percentage)             0.00%    
Target performance units | Maximum                  
Share-Based Compensation, Additional Disclosures                  
Vesting rights based on the satisfaction of certain performance or market-based criteria (as a percentage)             200.00%    
Market-based units                  
Share-Based Compensation, Additional Disclosures                  
Vesting period (in years)             3 years    
Period which award is subject to a market condition (in years)             3 years    
Number of Units                  
Nonvested at the beginning of the period (in shares)             323,825    
Granted (in shares)             248,020    
Vested (in shares)             0    
Forfeited (in shares)             0    
Nonvested at the end of the period (in shares)         571,845   571,845    
Weighted Average Grant Date Fair Value                  
Nonvested at the beginning of the period (in dollars per share)             $ 16.63    
Granted (in dollars per share)             10.62    
Vested (in dollars per share)             0.00    
Forfeited (in dollars per share)             0.00    
Nonvested at the end of the period (in dollars per share)         $ 14.02   $ 14.02    
Market-based units | Minimum                  
Share-Based Compensation, Additional Disclosures                  
Vesting rights based on the satisfaction of certain performance or market-based criteria (as a percentage)             0.00%    
Market-based units | Maximum                  
Share-Based Compensation, Additional Disclosures                  
Vesting rights based on the satisfaction of certain performance or market-based criteria (as a percentage)             150.00%