XML 130 R108.htm IDEA: XBRL DOCUMENT v3.10.0.1
Stock-Based Compensation - Restricted and Unrestricted Stock Awards (Details) - Restricted And Unrestricted Stock Awards - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Outstanding, shares 28 42 0
Outstanding, Weighted Average Fair Value $ 36.84 $ 36.84 $ 0.00
Outstanding and nonvested, Weighted Average Remaining Contractual Term (in years) 2 years 3 years 0 years
Grants in period, shares   52 17
Grants in period, Weighted Average Fair Value   $ 36.48 $ 33.73
Vested in period, shares (14) (10) (17)
Vested in period, Weighted Average Fair Value $ 36.84 $ 34.98 $ 33.73