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Net Income Per Unit (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
USD ($)
$ / shares
shares
Sep. 30, 2016
USD ($)
$ / shares
shares
Sep. 30, 2017
USD ($)
$ / shares
shares
Sep. 30, 2016
USD ($)
$ / shares
shares
Feb. 25, 2016
shares
Net Income Per Unit [Line Items]          
Net income attributable to partners $ 16,923 $ 13,151 $ 50,495 $ 47,492  
Less: Partners' distribution 17,418 15,920 51,380 46,039  
Allocation of distributions (in excess of) less than earnings $ (5,347) $ (6,151) $ (14,582) $ (6,990)  
Footnote [Abstract]          
General partner's ownership interest (as percent) 2.00% 2.00% 2.00% 2.00%  
Quarterly distributions of available cash, minimum level (in dollars per share) | $ / shares     0.43125    
Common share equivalents excluded (in shares) | shares 0 6,540 10,090 6,540  
Common Units [Member]          
Net Income Per Unit [Line Items]          
Common units - (basic) (in shares) | shares [1] 24,361,457 24,303,740 24,341,921 21,878,935  
Common units - (diluted) (in shares) | shares [1] 24,389,582 24,380,334 24,382,426 21,962,733  
Common units - (basic) (in dollars per share) | $ / shares [1] $ 0.50 $ 0.41 $ 1.52 $ 1.61  
Common units - (diluted) (in dollars per share) | $ / shares [1] $ 0.50 $ 0.41 $ 1.52 $ 1.60  
Subordinated unitholders - Delek [Member]          
Net Income Per Unit [Line Items]          
Subordinated units - Delek (basic and diluted) (in shares) | shares [1] 0 0 0 2,408,610  
Subordinated units - Delek (basic and diluted) (in dollars per share) | $ / shares [1] $ 0.00 $ 0.00 $ 0.00 $ 1.64  
Footnote [Abstract]          
Common units outstanding (in shares) | shares         11,999,258
General Partner [Member]          
Net Income Per Unit [Line Items]          
Net income attributable to partners     $ 13,406    
Less: General partner's distribution (including IDRs) [2] $ 4,852 $ 3,382 13,697 $ 8,443  
Allocation of distributions (in excess of) less than earnings (107) (123) (291) (140)  
Total partner's earnings 4,745 3,259 13,406 8,303  
Limited Partner [Member] | Common Units [Member]          
Net Income Per Unit [Line Items]          
Less: Partners' distribution 17,418 15,920 51,380 41,615  
Allocation of distributions (in excess of) less than earnings (5,240) (6,028) (14,291) (6,368)  
Total partner's earnings $ 12,178 $ 9,892 $ 37,089 $ 35,247  
Common units - (basic) (in shares) | shares [3] 24,361,457 24,303,740 24,341,921 21,878,935  
Common units - (diluted) (in shares) | shares [3] 24,389,582 24,380,334 24,382,426 21,962,733  
Common units - (basic) (in dollars per share) | $ / shares [3] $ 0.50 $ 0.41 $ 1.52 $ 1.61  
Common units - (diluted) (in dollars per share) | $ / shares [3],[4] $ 0.50 $ 0.41 $ 1.52 $ 1.60  
Limited Partner [Member] | Subordinated Units [Member]          
Net Income Per Unit [Line Items]          
Less: Partners' distribution $ 0 $ 0 $ 0 $ 4,424  
Allocation of distributions (in excess of) less than earnings 0 0 0 (482)  
Total partner's earnings $ 0 $ 0 $ 0 $ 3,942  
Subordinated units - Delek (basic and diluted) (in shares) | shares [3],[5] 0 0 0 2,408,610  
Subordinated units - Delek (basic and diluted) (in dollars per share) | $ / shares [3] $ 0.00 $ 0.00 $ 0.00 $ 1.64  
[1] We base our calculation of net income per unit on the weighted-average number of common and subordinated limited partner units outstanding during the period. The weighted-average number of common and subordinated units reflect the conversion of the subordinated units to common units on February 25, 2016. See Note 7 for further discussion.
[2] General partner distributions (including IDRs) consist of the 2% general partner interest and IDRs, which represent the right of the general partner to receive increasing percentages of quarterly distributions of available cash from operating surplus in excess of $0.43125 per unit per quarter. See Note 8 for further discussion related to IDRs.
[3] We base our calculation of net income per unit on the weighted-average number of common and subordinated limited partner units outstanding during the period. The weighted-average number of common and subordinated units reflects the conversion of the subordinated units to common units on February 25, 2016.
[4] Outstanding common unit equivalents totaling 10,090 were excluded from the diluted earnings per unit calculation for the nine months ended September 30, 2017. There were no outstanding common unit equivalents excluded from the diluted earnings per unit calculation for the three months ended September 30, 2017. Outstanding common unit equivalents of 6,540 were excluded from the diluted earnings per unit calculation for both the three and nine months ended September 30, 2016, as these common unit equivalents did not have a dilutive effect under the treasury stock method.
[5] On February 25, 2016, each of the Partnership's 11,999,258 outstanding subordinated units converted into common units and began participating pro rata with the other common units in distributions of available cash. Distributions and the Partnership's net income were allocated to the subordinated units through February 24, 2016.