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Share-Based Compensation - Options Outstanding and Exercisable (Details) - Options
 12 Months Ended
Dec. 30, 2017
$ / shares
shares
Options Outstanding  
Number Outstanding (in shares) | shares 665,717
Weighted-Average Remaining Contractual Life (years) 4 years
Weighted-Average Exercise Price (in dollars per share) $ 24.14
Options Exercisable  
Number Exercisable (in shares) | shares 456,639
Weighted-Average Remaining Contractual Life (years) 3 years 4 months 21 days
Weighted-Average Exercise Price (in dollars per share) $ 22.78
Options, Number of Shares  
Non-vested balance at the beginning of the period (in shares) | shares 367,120
Granted (in shares) | shares 22,757
Vested (in shares) | shares (172,115)
Forfeited (in shares) | shares (8,684)
Non-vested balance at the end of the period (in shares) | shares 209,078
Options, Weighted-Average Fair Value  
Non-vested balance at the beginning of the period (in dollars per share) $ 8.74
Granted (in dollars per share) 11.54
Vested (in dollars per share) 8.80
Forfeited (in dollars per share) 8.95
Non-vested balance at the end of the period (in dollars per share) 8.98
$16.12 - 21.48  
Share-based compensation  
Exercise price, low end of range (in dollars per share) 16.12
Exercise price, high end of range (in dollars per share) $ 21.48
Options Outstanding  
Number Outstanding (in shares) | shares 181,630
Weighted-Average Remaining Contractual Life (years) 2 years 10 months 21 days
Weighted-Average Exercise Price (in dollars per share) $ 18.48
Options Exercisable  
Number Exercisable (in shares) | shares 181,630
Weighted-Average Remaining Contractual Life (years) 2 years 10 months 21 days
Weighted-Average Exercise Price (in dollars per share) $ 18.48
$21.49 - 26.86  
Share-based compensation  
Exercise price, low end of range (in dollars per share) 21.49
Exercise price, high end of range (in dollars per share) $ 26.86
Options Outstanding  
Number Outstanding (in shares) | shares 276,737
Weighted-Average Remaining Contractual Life (years) 4 years 26 days
Weighted-Average Exercise Price (in dollars per share) $ 21.60
Options Exercisable  
Number Exercisable (in shares) | shares 158,035
Weighted-Average Remaining Contractual Life (years) 3 years 5 months 23 days
Weighted-Average Exercise Price (in dollars per share) $ 21.66
$26.87 - 32.23  
Share-based compensation  
Exercise price, low end of range (in dollars per share) 26.87
Exercise price, high end of range (in dollars per share) $ 32.23
Options Outstanding  
Number Outstanding (in shares) | shares 184,593
Weighted-Average Remaining Contractual Life (years) 4 years 3 months
Weighted-Average Exercise Price (in dollars per share) $ 30.98
Options Exercisable  
Number Exercisable (in shares) | shares 116,974
Weighted-Average Remaining Contractual Life (years) 4 years 15 days
Weighted-Average Exercise Price (in dollars per share) $ 30.98
42.98 - 48.35  
Share-based compensation  
Exercise price, low end of range (in dollars per share) 42.98
Exercise price, high end of range (in dollars per share) $ 48.35
Options Outstanding  
Number Outstanding (in shares) | shares 22,757
Weighted-Average Remaining Contractual Life (years) 9 years 11 months 19 days
Weighted-Average Exercise Price (in dollars per share) $ 44.87