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Share-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 29, 2019
Feb. 20, 2019
Jun. 25, 2018
Mar. 30, 2018
May 04, 2019
May 05, 2018
Disclosure of share-based compensation information under stock plans            
Share-based compensation expense         $ 4,468 $ 3,958
Share-Based Compensation, Additional Disclosures            
Unrecognized compensation cost related to nonvested stock options         $ 6,600  
Weighted average period for recognition of unrecognized compensation cost (in years/months/days)         1 year 9 months 22 days  
Weighted average fair values of stock options granted during the period (in dollars per share)         $ 6.72 $ 5.89
Granted (in shares) 5,100     431,371    
Employee Stock Purchase Plan            
Disclosure of share-based compensation information under stock plans            
Share-based compensation expense         $ 63 $ 93
Stock options            
Disclosure of share-based compensation information under stock plans            
Share-based compensation expense         590 695
Stock awards or units            
Disclosure of share-based compensation information under stock plans            
Share-based compensation expense         3,815 $ 3,170
Share-Based Compensation, Additional Disclosures            
Unrecognized compensation cost related to nonvested stock awards/units         $ 25,900  
Number of Units            
Granted (in shares) 280,700     490,528    
Performance-based or market-based units            
Number of Units            
Granted (in shares)     619,578      
Target performance units            
Share-Based Compensation, Additional Disclosures            
Vesting period (in years)         3 years  
Target performance units | Minimum            
Share-Based Compensation, Additional Disclosures            
Target vesting percentage         0.00%  
Target performance units | Maximum            
Share-Based Compensation, Additional Disclosures            
Target vesting percentage         200.00%  
Performance-based units            
Number of Units            
Nonvested at the beginning of the period (in shares)         1,371,230  
Granted (in shares)         250,000  
Vested (in shares)         40,235  
Forfeited (in shares)         268,087  
Nonvested at the end of the period (in shares)         1,312,908  
Weighted Average Grant Date Fair Value            
Nonvested at the beginning of the period (in dollars per share)         $ 16.44  
Granted (in dollars per share)         21.38  
Vested (in dollars per share)         21.83  
Forfeited (in dollars per share)         18.19  
Nonvested at the end of the period (in dollars per share)         $ 16.86  
Market Based Shares            
Number of Units            
Nonvested at the beginning of the period (in shares)         518,409  
Granted (in shares)         17,557  
Vested (in shares)         158,014  
Forfeited (in shares)         89,750  
Nonvested at the end of the period (in shares)         288,202  
Weighted Average Grant Date Fair Value            
Nonvested at the beginning of the period (in dollars per share)         $ 14.28  
Granted (in dollars per share)         15.20  
Vested (in dollars per share)         15.20  
Forfeited (in dollars per share)         15.58  
Nonvested at the end of the period (in dollars per share)         $ 13.43  
Market Based Shares | Minimum            
Share-Based Compensation, Additional Disclosures            
Target vesting percentage         0.00%  
Market Based Shares | Maximum            
Share-Based Compensation, Additional Disclosures            
Target vesting percentage         150.00%  
Chief Executive Officer            
Share-Based Compensation, Additional Disclosures            
Granted (in shares)   600,000        
Chief Executive Officer | Restricted Stock Units With Contingency            
Number of Units            
Granted (in shares)   150,000        
Chief Executive Officer | Performance-based units            
Number of Units            
Granted (in shares)   250,000        
Vesting, Tranches After Initial Vesting Period | Nonvested Performance Shares | Minimum            
Share-Based Compensation, Additional Disclosures            
Vesting period (in years)         2 years  
Vesting, Tranches After Initial Vesting Period | Nonvested Performance Shares | Maximum            
Share-Based Compensation, Additional Disclosures            
Vesting period (in years)         3 years