XML 52 R40.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock Compensation (Details)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 29, 2018
USD ($)
trading_day
$ / shares
shares
Sep. 30, 2017
USD ($)
Sep. 29, 2018
USD ($)
$ / shares
shares
Sep. 30, 2017
USD ($)
Dec. 30, 2017
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock based compensation expense | $ $ 1.7 $ 0.3 $ 14.7 $ 1.8  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]          
Stock price (in dollars per share) | $ / shares $ 38.17   $ 38.17   $ 9.76
Expected volatility         33.80%
Risk-free interest rate         1.55%
Expected term (in years) 0 years       16 days
Stock Appreciation Rights (SARs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average exercise price, trading day average | trading_day 20        
Weighted average exercise price (in dollars per share) | $ / shares $ 7.00        
Options outstanding (in shares) | shares 222,500   222,500    
Deferred compensation liability | $ $ 7.2   $ 7.2   $ 1.0
Payable within thirty days of the vesting date | Stock Appreciation Rights (SARs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     30 days    
Payable within one year of vesting date | Stock Appreciation Rights (SARs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     1 year