v3.10.0.1
Partnership Equity and Distributions (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Nov. 12, 2018
USD ($)
Nov. 02, 2018
USD ($)
$ / shares
Aug. 17, 2018
USD ($)
$ / shares
Jul. 31, 2018
USD ($)
May 18, 2018
USD ($)
$ / shares
Apr. 20, 2018
USD ($)
Feb. 13, 2018
USD ($)
$ / shares
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
Dec. 31, 2018
$ / shares
Dec. 31, 2018
USD ($)
$ / item
Dec. 31, 2017
USD ($)
Partnership equity and distributions                                  
Annual cash distribution (per unit)                               0.68  
Cash distribution declared (in dollars per unit) | $ / shares                             $ 0.47    
Subordinated units | shares                         75,940,957        
Common units conversion ratio                         1        
Distributions | $ $ 1,881 $ 120,118 $ 110,762 $ 21 $ 101,404 $ 263 $ 92,003 $ 1,392 $ 82,521 $ 75,023 $ 67,306 $ 75   $ 57,633   $ 426,452 $ 283,950
Distributions per limited partner unit (in dollars per share) | $ / shares   $ 0.4400 $ 0.4150   $ 0.3900   $ 0.3650   $ 0.3400 $ 0.3200 $ 0.3000     $ 0.2800      
General Partner                                  
Partnership equity and distributions                                  
Distributions | $   $ 37,815 $ 33,138   $ 28,461   $ 23,772   $ 19,067 $ 15,328 $ 11,553     $ 7,543   123,186 53,491
Common units                                  
Partnership equity and distributions                                  
Distributions | $ $ 1,881 $ 82,303 $ 77,624 $ 21 $ 72,943 $ 263 $ 68,231 $ 1,392 $ 63,454 $ 59,695 $ 55,753 $ 75   $ 50,090   $ 303,266 $ 230,459
Minimum                                  
Partnership equity and distributions                                  
Minimum quarterly cash distribution (per unit)                               0.17  
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 $0.1955 up to $0.2125 | Minimum                                  
Partnership equity and distributions                                  
Pro rata cash distribution to the holders of common and subordinate units                               0.1955  
Above $0.1955 up to $0.2125 | Maximum                                  
Partnership equity and distributions                                  
Pro rata cash distribution to the holders of common and subordinate units                               0.2125  
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 $0.2125 up to $0.2550 | Minimum                                  
Partnership equity and distributions                                  
Pro rata cash distribution to the holders of common and subordinate units                               0.2125  
Above $0.2125 up to $0.2550 | Maximum                                  
Partnership equity and distributions                                  
Pro rata cash distribution to the holders of common and subordinate units                               0.2550  
Above $0.2550                                  
Partnership equity and distributions                                  
Unitholders marginal percentage interest in distribution                               50.00%  
General Partners marginal percentage interest in distribution                               50.00%  
Above $0.2550 | Minimum                                  
Partnership equity and distributions                                  
Pro rata cash distribution to the holders of common and subordinate units                               0.2550