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Long-Term Incentive Compensation - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Deferred compensation arrangement, recorded liability         $ 2,000,000.0 $ 1,400,000
Stock-based compensation expense $ 2,100,000 $ 4,200,000 $ 5,300,000 $ 12,800,000    
Share-based compensation costs not yet recognized $ 11,300,000   $ 11,300,000      
Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Deferred compensation arrangement, potential maximum liability         0 0
Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Deferred compensation arrangement, potential maximum liability         $ 4,000,000.0 $ 2,700,000
Service-based Restricted Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period (in years)     3 years      
Performance-based Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance period (in years)     3 years      
Percentage of additional performance-based awards issued (in shares) 200.00%   200.00%      
Cash Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance period (in years)     3 years