Annual report pursuant to Section 13 and 15(d)

Net Income Per Limited Partner Unit (Details)

v3.8.0.1
Net Income Per Limited Partner Unit (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Net income per limited partner unit                      
Net income                 $ 307,315 $ 236,703 $ 159,105
Pre-Water Acquisition net income attributed to parent                     (40,193)
Net income attributable to incentive distribution rights $ (23,772) $ (19,067) $ (15,328) $ (11,553) $ (7,557) $ (4,806) $ (2,731) $ (1,850) (69,720) (16,944) (1,264)
Limited partners' interest in net income $ 40,383 $ 61,826 $ 71,847 $ 63,539 $ 65,794 $ 65,718 $ 47,181 $ 41,066 $ 237,595 $ 219,759 $ 117,648
Net income per limited partner unit - basic and diluted $ 0.22 $ 0.33 $ 0.39 $ 0.35 $ 0.37 $ 0.37 $ 0.27 $ 0.23 $ 1.28 $ 1.24 $ 0.74
Weighted average limited partner units outstanding - basic                 185,630,000 176,647,000 158,479,000
Weighted average units outstanding - diluted                 186,083,000 176,801,000 158,527,000
Restricted and phantom unit award                      
Net income per limited partner unit                      
Weighted average units outstanding - diluted                 453,035    
Weighted average units outstanding:                      
Antidilutive securities excluded from computation of earnings per share                 0    
Common units                      
Net income per limited partner unit                      
Weighted average units outstanding - diluted                 186,082,898