Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Incentive Compensation Plans (Weighted-Average Valuation Assumptions) (Details)

v3.8.0.1
Stock-Based Incentive Compensation Plans (Weighted-Average Valuation Assumptions) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 24, 2016
Sep. 30, 2017
Sep. 24, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]        
Expected volatility 56.32% 59.85% 56.32% 59.85%
Risk-free interest rate 1.65% 1.00% 1.65% 1.00%
Expected dividends 0.00% 0.00% 0.00% 0.00%
Expected life 3 years 11 months 1 day 3 years 11 months 23 days 3 years 11 months 1 day 3 years 11 months 23 days