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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 | Jan. 01, 2016 | Jan. 02, 2015 | Dec. 27, 2013 | Dec. 28, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Total share based compensation |  |  | $ 1,300 | $ 1,300 | $ 10,361 | $ 6,370 | $ 6,119 |
Shares available for future issuance |  |  | 2,199,778 |  | 2,199,778 |  |  |
Fair value | $ 1.31 |  |  |  |  |  |  |
Performance based stock option grant, Exercise price | $ 4.00 |  |  |  |  |  |  |
Shares exercised |  |  |  |  | 67,500 | 8,750 | 109,683 |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Total share based compensation |  |  |  |  | $ 6,800 | $ 5,000 | $ 4,900 |
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 |  |  | $ 6,900 |  | $ 6,900 |  |  |
Weighted average period, Restricted stock units |  |  |  |  | 1 year 8 months 27 days |  |  |
Common Stock Subject to Vesting Requirements [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Total share based compensation |  |  |  |  | $ 900 | 900 | 800 |
Options vesting period |  |  |  |  | 5 years |  |  |
Compensation expense related to common stock subject to vesting requirements |  |  | $ 4,200 |  | $ 4,200 |  |  |
Weighted average period, Common stock |  |  |  |  | 2 years 8 months 12 days |  |  |
Performance Shares [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Total share based compensation |  |  |  |  | $ 2,700 | $ 500 | $ 500 |
Performance based stock option grant | 2,916,563 | 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 | 470,000 |
Shares exercised |  |  |  |  | 0 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options vesting period |  |  |  |  | 4 years |  |  |
Maximum [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 |  |  |

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