Annual report pursuant to Section 13 and 15(d)

Partnership Equity and Distributions (Details)

v3.6.0.2
Partnership Equity and Distributions (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Feb. 09, 2017
shares
Jan. 11, 2017
$ / 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
Nov. 30, 2015
USD ($)
$ / shares
Nov. 20, 2015
USD ($)
Aug. 27, 2015
USD ($)
$ / shares
May 27, 2015
USD ($)
$ / shares
Feb. 27, 2015
USD ($)
$ / shares
Dec. 31, 2016
USD ($)
$ / item
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
shares
Partnership equity and distributions                              
Minimum quarterly cash distribution (per unit)                         0.17    
Annual cash distribution (per unit)                         0.68    
Total Distribution | $     $ 51,845 $ 849 $ 46,775 $ 43,252 $ 39,725 $ 36,333 $ 397 $ 28,858 $ 27,338 $ 14,322 $ 182,446 $ 107,248  
Cash distribution declared | $ / shares     $ 0.2650   $ 0.2500 $ 0.2350 $ 0.2200 $ 0.2050   $ 0.1900 $ 0.1800 $ 0.0943      
Subordinated units | shares                         75,941,000 75,941,000 75,941,000
Subsequent event                              
Partnership equity and distributions                              
Cash distribution declared | $ / shares   $ 0.28                          
Subordinated units | shares 75,940,957                            
Common units conversion ratio 1                            
General Partner                              
Partnership equity and distributions                              
Total Distribution | $     $ 4,820   $ 2,731 $ 1,850 $ 969 $ 295         $ 10,370 $ 295  
Common units | Limited Partner (Common units)                              
Partnership equity and distributions                              
Total Distribution | $     26,901 $ 849 25,059 23,556 22,048 20,470 $ 397 $ 14,429 $ 13,669 $ 7,161 98,413 56,126  
Limited Partner (Subordinated units) | Limited Partner (Common units)                              
Partnership equity and distributions                              
Total Distribution | $     $ 20,124   $ 18,985 $ 17,846 $ 16,708 $ 15,568   $ 14,429 $ 13,669 $ 7,161 $ 73,663 $ 50,827  
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                              
Annual cash distribution (per unit)                         1.02    
Annual cash distribution percentage                         150.00%    
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