v3.7.0.1
Partnership Equity and Distributions (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
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
Jun. 30, 2017
$ / shares
Jun. 30, 2017
USD ($)
$ / shares
$ / item
Dec. 31, 2016
USD ($)
Partnership equity and distributions                        
Annual cash distribution (per unit)                     0.68  
Minimum cash distributions to trigger unitholder and general partner distributions | $ / shares                     $ 0.1955  
Cash distribution declared | $ / shares                   $ 0.32    
Subordinated units | shares     75,940,957                  
Common units conversion ratio     1                  
Distributions | $ $ 67,306 $ 75   $ 57,633 $ 51,845 $ 849 $ 46,775 $ 43,252 $ 39,725   $ 125,014 $ 182,446
Distributions per limited partner unit (in dollars per share) | $ / shares $ 0.3000     $ 0.2800 $ 0.2650   $ 0.2500 $ 0.2350 $ 0.2200      
General Partner                        
Partnership equity and distributions                        
Distributions | $ $ 11,553     $ 7,543 $ 4,820   $ 2,731 $ 1,850 $ 969   19,096 10,370
Common units | Limited Partner (Common units)                        
Partnership equity and distributions                        
Distributions | $ $ 55,753 $ 75   28,827 26,901 $ 849 25,059 23,556 22,048   84,655 98,413
Limited Partner (Subordinated units) | Limited Partner (Common units)                        
Partnership equity and distributions                        
Distributions | $       $ 21,263 $ 20,124   $ 18,985 $ 17,846 $ 16,708   $ 21,263 $ 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