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Share-Based Compensation - 2006 Equity Plan (Details)
12 Months Ended
Dec. 30, 2017
shares
2006 Incentive Plan  
Shares Using Fungibility Ratio  
Maximum shares of common stock issuable 5,274,000
Shares initially reserved for issuance 500,000
Shares available for grant 434,374
2006 Incentive Plan | On or after April 30, 2010  
Share-based compensation  
Fungibility ratio (as a percent) 1.83%
2006 Incentive Plan | Shares approved in 2008  
Shares Using Fungibility Ratio  
Maximum shares of common stock issuable 210,000
2006 Incentive Plan | Shares approved in 2010  
Shares Using Fungibility Ratio  
Maximum shares of common stock issuable 1,464,000
2006 Incentive Plan | Shares approved in 2012  
Shares Using Fungibility Ratio  
Maximum shares of common stock issuable 2,500,000
Cancellation of restricted shares or units increase (decrease), available for grant 800,000
2006 Incentive Plan | Shares approved on July 12, 2017  
Shares Using Fungibility Ratio  
Maximum shares of common stock issuable 400,000
1998 Option Plan  
Shares Using Fungibility Ratio  
Shares available for grant 1,000,000