XML 133 R116.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation - Restricted and Unrestricted Stock Awards (Details) - Restricted And Unrestricted Stock Awards - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]        
Outstanding, shares 42 0 0 17
Outstanding, Weighted Average Fair Value $ 36.84 $ 0.00 $ 0.00 $ 56.80
Outstanding and nonvested, Weighted Average Remaining Contractual Term (in years) 3 years 0 years 0 years 1 year
Grants in period, shares 52 17 12  
Grants in period, Weighted Average Fair Value $ 36.48 $ 33.73 $ 60.07  
Vested in period, shares (10) (17) (27)  
Vested in period, Weighted Average Fair Value $ 34.98 $ 33.73 $ 58.24  
Forfeitures in Period, shares     (2)  
Forfeitures in Period, Weighted Average Fair Value     $ 56.80