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Stock Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 08, 2012
Mar. 31, 2013
Jan. 01, 2016
Oct. 02, 2015
Dec. 30, 2016
Jan. 01, 2016
Jan. 02, 2015
Dec. 27, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share based compensation     $ 1,300 $ 1,300 $ 8,765 $ 10,361 $ 6,370  
Shares available for future issuance         1,654,976      
Fair value $ 1.31              
Long term cash rate         30.00%      
Performance based stock option grant, Exercise price $ 4.00              
Shares exercised           67,500 8,750  
Restricted Stock Units (RSUs) [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share based compensation         $ 7,600 $ 6,800 $ 5,000  
Restricted stock units, vesting schedules options one         4 years      
Restricted stock units, vesting schedules options two         4 years      
Restricted stock units, vesting schedules options three         3 years      
Percentage of vesting on restricted stock, option two, First anniversary         25.00%      
Percentage of vesting on restricted stock, option three, First anniversary         33.00%      
Percentage of vesting on restricted stock, option one, Second anniversary         50.00%      
Percentage of vesting on restricted stock, option two, Second anniversary         25.00%      
Percentage of vesting on restricted stock, option three, Second anniversary         33.00%      
Percentage of vesting on restricted stock, option one, Third anniversary         25.00%      
Percentage of vesting on restricted stock, option two, Third anniversary         25.00%      
Percentage of vesting on restricted stock, option three, Third anniversary         33.00%      
Percentage of vesting on restricted stock, option one, Fourth anniversary         25.00%      
Percentage of vesting on restricted stock, option two, Fourth anniversary         25.00%      
Compensation expense related to nonvested restricted stock unit based awards         $ 7,600      
Weighted average period, Restricted stock units         1 year 6 months 4 days      
Common Stock Subject to Vesting Requirements [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share based compensation         $ 1,200 900 900  
Options vesting period         5 years      
Compensation expense related to common stock subject to vesting requirements         $ 2,700      
Weighted average period, Common stock         1 year 9 months 18 days      
Performance Shares [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share based compensation           $ 2,700 $ 500  
Performance based stock option grant 2,916,563 2,916,563            
Existing restricted stock unit Exchange Percentage 50.00%              
Growth of Pro-forma EPS Percentage 50.00%              
Growth of Pro-forma EBITDA percentage 50.00%              
Performance based stock option vesting term         6 years      
Trailing period         12 months      
Percentage of outstanding option on performance based         100.00%      
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              
Stock Appreciation Rights (SARs) [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Surrendered shares               470,000
Shares exercised         0      
Minimum [Member] | Stock Appreciation Rights (SARs) And Stock Options [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Options vesting period         4 years      
Maximum [Member] | Stock Appreciation Rights (SARs) And Stock Options [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Options vesting period         10 years      
Technolab International Corporation [Member] | Common Stock Subject to Vesting Requirements [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Options vesting period           4 years    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Share-based Liabilities Paid           $ 4,600