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Share Based Compensation (Details) - USD ($)
1 Months Ended 3 Months Ended
Apr. 30, 2020
Jan. 31, 2020
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation expense (benefit)     $ (600,000) $ 1,200,000
Cash payments distributed related to awards previously granted and now payable   $ 2,000,000.0    
Outstanding awards vested during period     3,400,000  
Performance Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards forfeited during period, value     $ 0 $ 0
Awards forfeited during period, units     0 0
Director Incentive Agreement [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards granted during period (in units)     5,048  
Award vesting period     3 years  
2006 Performance Unit Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards granted during period (in units)     0  
2006 Performance Unit Plan [Member] | Performance Units [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock to be issued with plan     0  
2020 Performance Unit Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock to be issued with plan     0  
2020 Performance Unit Plan [Member] | Performance Units [Member] | Subsequent Event [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards granted during period (in units) 9,822      
2020 Performance Unit Plan [Member] | Performance Units [Member] | Maximum [Member] | Subsequent Event [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards to be granted as percentage of target units 200.00%      
2020 Performance Unit Plan [Member] | Performance Units [Member] | Minimum [Member] | Subsequent Event [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards to be granted as percentage of target units 0.00%      
2020 Performance Unit Plan [Member] | Restricted Units [Member] | Subsequent Event [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards granted during period (in units) 9,822      
Award vesting period 3 years