Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Long-Term Awards (Details)

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Stock-Based Compensation Long-Term Awards (Details)
 3 Months Ended
Mar. 31, 2019
shares
Net annual and long-term LTIP awards as of March 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
Two Thousand Seventeen Program [Member] | Long-Term Awards [Member]  
Net annual and long-term LTIP awards as of December 31, 2018 (at target) 96
LTIP Unit target grants via the 2019 Performance Program 0 [1]
LTIP Units not earned under the 2018 Performance Program – Annual Awards 0 [2]
Net annual and long-term LTIP awards as of March 31, 2019 (at target) 96
2018 Program [Member] | Total Annual Long term Awards [Member]  
LTIP Unit target grants via the 2019 Performance Program (108) [2]
LTIP Units not earned under the 2018 Performance Program – Annual Awards (28) [2]
LTIP unit forfeitures (25) [3]
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 (108) [2]
LTIP Units not earned under the 2018 Performance Program – Annual Awards (28) [2]
LTIP unit forfeitures (25) [3]
Net annual and long-term LTIP awards as of March 31, 2019 (at target) 0
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 [1]
Net annual and long-term LTIP awards as of March 31, 2019 (at target) 110
2019 Program [Member] | Total Annual Long term Awards [Member]  
LTIP Unit target grants via the 2019 Performance Program 215 [1]
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 [1]
Net annual and long-term LTIP awards as of March 31, 2019 (at target) 133
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 [1]
Net annual and long-term LTIP awards as of March 31, 2019 (at target) 82
[1] These target Annual Awards and Long-Term Awards were approved by the Board on March 5, 2019.
[2] These amounts represents grants from the 2018 program Annual Awards. Refer to the “Time-Based Grants” table above which presents these grants as earned and time-based.
[3] On March 5, 2019 the Compensation Committee determined the extent to which the Company achieved the performance goals and concluded that these target awards were not achieved.