Annual report pursuant to Section 13 and 15(d)

Partnership Equity and Distributions (Details)

v3.8.0.1
Partnership Equity and Distributions (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Nov. 17, 2017
USD ($)
Nov. 16, 2017
USD ($)
$ / shares
Aug. 16, 2017
USD ($)
$ / shares
May 10, 2017
USD ($)
$ / shares
Apr. 30, 2017
USD ($)
Feb. 09, 2017
shares
Feb. 08, 2017
USD ($)
$ / shares
Nov. 24, 2016
USD ($)
$ / shares
Nov. 18, 2016
USD ($)
Aug. 24, 2016
USD ($)
$ / shares
May 25, 2016
USD ($)
$ / shares
Feb. 29, 2016
USD ($)
$ / shares
Dec. 31, 2017
$ / shares
Dec. 31, 2017
USD ($)
$ / item
Dec. 31, 2016
USD ($)
Partnership equity and distributions                              
Annual cash distribution (per unit)                           0.68  
Cash distribution declared | $ / shares                         $ 0.365    
Subordinated units | shares           75,940,957                  
Common units conversion ratio           1                  
Distributions | $ $ 1,392 $ 82,521 $ 75,023 $ 67,306 $ 75   $ 57,633 $ 51,845 $ 849 $ 46,775 $ 43,252 $ 39,725   $ 283,950 $ 182,446
Distributions per limited partner unit (in dollars per share) | $ / shares   $ 0.3400 $ 0.3200 $ 0.3000     $ 0.2800 $ 0.2650   $ 0.2500 $ 0.2350 $ 0.2200      
General Partner                              
Partnership equity and distributions                              
Distributions | $   $ 19,067 $ 15,328 $ 11,553     $ 7,543 $ 4,820   $ 2,731 $ 1,850 $ 969   53,491 10,370
Common units                              
Partnership equity and distributions                              
Distributions | $ $ 1,392 $ 63,454 $ 59,695 $ 55,753 $ 75   $ 50,090 26,901 $ 849 25,059 23,556 22,048   $ 230,459 98,413
Limited Partner (Subordinated units) | Limited Partner (Common units)                              
Partnership equity and distributions                              
Distributions | $               $ 20,124   $ 18,985 $ 17,846 $ 16,708     $ 73,663
Above $0.1955 up to $0.2125                              
Partnership equity and distributions                              
Unitholders marginal percentage interest in distribution                           85.00%  
General Partners marginal percentage interest in distribution                           15.00%  
Above $0.2125 up to $0.2550                              
Partnership equity and distributions                              
Unitholders marginal percentage interest in distribution                           75.00%  
General Partners marginal percentage interest in distribution                           25.00%  
Above $0.2550                              
Partnership equity and distributions                              
Unitholders marginal percentage interest in distribution                           50.00%  
General Partners marginal percentage interest in distribution                           50.00%  
Minimum                              
Partnership equity and distributions                              
Minimum quarterly cash distribution (per unit)                           0.17  
Minimum | Above $0.1955 up to $0.2125                              
Partnership equity and distributions                              
Pro rata cash distribution to the holders of common and subordinate units                           0.1955  
Minimum | Above $0.2125 up to $0.2550                              
Partnership equity and distributions                              
Pro rata cash distribution to the holders of common and subordinate units                           0.2125  
Minimum | Above $0.2550                              
Partnership equity and distributions                              
Pro rata cash distribution to the holders of common and subordinate units                           0.2550  
Maximum | Above $0.1955 up to $0.2125                              
Partnership equity and distributions                              
Pro rata cash distribution to the holders of common and subordinate units                           0.2125  
Maximum | Above $0.2125 up to $0.2550                              
Partnership equity and distributions                              
Pro rata cash distribution to the holders of common and subordinate units                           0.2550