XML 64 R48.htm IDEA: XBRL DOCUMENT v3.19.1
Share Based Compensation (Details) - Performance Units [Member] - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Jan. 31, 2019
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense   $ 1.2 $ 0.2
Cash payments distributed related to awards previously granted and now payable $ 1.5    
Awards forfeited during period, value   $ 0.0 $ 0.0
Awards forfeited during period, units   0 0
Outstanding awards vested during period   $ 5.3  
Director Incentive Agreement [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards granted during period (in units)   5,175  
Award vesting period   3 years  
Performance Unit Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards granted during period (in units)   17,022  
Award vesting period   5 years