Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Long-Term Awards (Details)

v3.20.1
Stock-Based Compensation - Long-Term Awards (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Net annual and long-term LTIP awards as of December 31, 2019 (at target) 421  
Total Annual Long term Awards [Member]    
Net annual and long-term LTIP awards as of December 31, 2018 (at target) 367  
Net annual and long-term LTIP awards as of December 31, 2019 (at target)   367
2017 Program [Member] | Long-Term Awards [Member]    
Net annual and long-term LTIP awards as of December 31, 2018 (at target) 96  
Net annual and long-term LTIP awards as of December 31, 2019 (at target) 96 96
2018 Program [Member] | Annual Awards [Member]    
Net annual and long-term LTIP awards as of December 31, 2018 (at target) 161  
LTIP Unit target grants via the 2019 Performance Program 28  
LTIP Units earned and granted under the 2018 Performance Program - Annual Awards (108)  
LTIP unit forfeitures (25)  
Net annual and long-term LTIP awards as of December 31, 2019 (at target) 0 161
2018 Program [Member] | Long-Term Awards [Member]    
Net annual and long-term LTIP awards as of December 31, 2018 (at target) 110  
LTIP Unit target grants via the 2019 Performance Program 0 0
LTIP Units earned and granted under the 2018 Performance Program - Annual Awards 0  
Net annual and long-term LTIP awards as of December 31, 2019 (at target) 110 110
2018 Program [Member] | Total Annual Long term Awards [Member]    
LTIP Units earned and granted under the 2018 Performance Program - Annual Awards (108)  
LTIP unit forfeitures (25)  
2018 Program [Member] | Discretionary [Member] | Total Annual Long term Awards [Member]    
LTIP Unit target grants via the 2019 Performance Program 28  
2019 Program [Member] | Annual Awards [Member]    
Net annual and long-term LTIP awards as of December 31, 2018 (at target) 0  
LTIP Unit target grants via the 2019 Performance Program 133  
Net annual and long-term LTIP awards as of December 31, 2019 (at target) 133 0
2019 Program [Member] | Long-Term Awards [Member]    
Net annual and long-term LTIP awards as of December 31, 2018 (at target) 0  
LTIP Unit target grants via the 2019 Performance Program 82  
LTIP Units earned and granted under the 2018 Performance Program - Annual Awards 0  
Net annual and long-term LTIP awards as of December 31, 2019 (at target) 82 0
2019 Program [Member] | Total Annual Long term Awards [Member]    
LTIP Unit target grants via the 2019 Performance Program 215