XML 49 R51.htm IDEA: XBRL DOCUMENT v3.20.1
Stock-based Compensation (Details 2) - Restricted Stock Units [Member] - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]    
Balance at beginning 6,813 14,395
Granted 6,191 [1] 3,787 [2]
Vested (7,127) (11,190)
Forfeited (179)
Balance at ending 5,877 6,813
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Balance at beginning $ 19.60 $ 37.20
Granted 30.20 32.40
Vested 22.00 51.20
Forfeited 139.80
Balance at ending $ 30.28 $ 19.60
[1] 314 restricted stock units were granted on February 14, 2019 with a weighted average grant date fair value of $17.09. 3,877 restricted stock units were granted on June 18, 2019 with a weighted average grant date fair value of $28.40. 2,000 restricted stock units were granted on June 30, 2019 with a weighted average grant date fair value of $36.00.
[2] 641 restricted stock units were granted on June 12, 2017 with a weighted average grant date fair value of $13.00 and 3,146 restricted stock units were granted on June 12, 2018 with a weighted average grant date fair value of $36.40