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Selected Quarterly Financial Data (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Selected Quarterly Financial Information [Abstract]                      
Net sales $ 151,207 $ 130,626 $ 126,769 $ 129,473 $ 124,680 $ 107,470 $ 111,853 $ 104,056 $ 538,075 $ 448,059 $ 589,669
Operating income 23,698 22,636 23,371 18,472 19,163 17,001 22,512 18,974 88,177 77,650 77,262
Net income 18,914 16,923 18,977 14,595 15,312 13,151 18,893 15,448 69,409 62,804 66,211
Limited partners' interest in net income $ 13,891 $ 12,178 $ 14,425 $ 10,486 $ 11,422 $ 9,892 $ 16,102 $ 13,195 $ 50,980 $ 50,611 $ 61,685
Common Units                      
Common (basic) $ 0.57 $ 0.50 $ 0.59 $ 0.43 $ 0.47 $ 0.41 $ 0.66 $ 0.54 $ 2.09 [1] $ 2.08 [1] $ 2.55 [1]
Common units - (diluted) $ 0.57 $ 0.50 $ 0.59 $ 0.43 0.47 0.41 0.66 0.54 2.09 [1] 2.07 [1] 2.52 [1]
Subordinated- Delek                      
Subordinated units - Delek (basic and diluted)         $ 0.00 $ 0.00 $ 0.00 $ 0.54 $ 0.00 [1] $ 2.19 [1] $ 2.54 [1]
[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 Notes 5 and 12 for further discussion.