Segment Reporting - Summary of Financial Information for Partnership's Reportable Segments (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Net sales:                      
Net sales $ 766,825 $ 422,779 $ 477,487 $ 722,907 $ 663,791 $ 558,022 $ 661,743 $ 1,598,358 $ 2,389,998 $ 3,481,914 $ 5,069,762
Adjusted gross margin:                      
Adjusted gross margin                 259,273 276,002 244,967
Operating costs and expenses not allocated to operating segments:                      
Operating expenses                 65,882 71,468 62,993
Selling, general and administrative                 84,257 94,403 76,420
Depreciation and amortization                 21,237 20,342 17,625
Operating income                 39,533 106,777 157,693
Other (expense) income                 (114) 298 (288)
Interest income                 388 456 569
Interest expense                 (27,533) (27,367) (29,651)
Income tax provision                 (2,108) (1,816) (5,509)
Net income $ (1,116) $ (8,794) $ (9,745) $ 29,821 $ 28,379 $ 8,580 $ (2,550) $ 43,939 10,166 78,348 122,814
Operating Segments | Refined products                      
Net sales:                      
Net sales                 1,988,597 3,063,858 4,650,871
Adjusted gross margin:                      
Adjusted gross margin                 142,581 170,448 146,021
Operating Segments | Natural gas                      
Net sales:                      
Net sales                 334,003 347,453 359,984
Adjusted gross margin:                      
Adjusted gross margin                 62,435 51,004 55,536
Operating Segments | Materials handling                      
Net sales:                      
Net sales                 45,734 45,570 37,776
Adjusted gross margin:                      
Adjusted gross margin                 45,712 45,564 37,811
Operating Segments | Other                      
Net sales:                      
Net sales                 21,664 25,033 21,131
Adjusted gross margin:                      
Adjusted gross margin                 8,545 8,986 5,599
Segment Reconciling Items                      
Reconciliation to operating income:                      
Add: unrealized gain (loss) on inventory derivatives                 (31,304) (2,079) 11,070
Add: unrealized gas (loss) on prepaid forward contract derivatives                 1,552 (2,628) 0
Add: unrealized gain (loss) on natural gas transportation contracts                 (18,612) 21,695 58,694
Operating costs and expenses not allocated to operating segments:                      
Operating expenses                 (65,882) (71,468) (62,993)
Selling, general and administrative                 (84,257) (94,403) (76,420)
Depreciation and amortization                 $ (21,237) $ (20,342) $ (17,625)