Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net revenue	$ 225,580,000	$ 157,405,000	$ 597,769,000	$ 483,853,000
Depreciation and amortization	20,237,000	12,946,000	48,863,000	35,112,000
Total cost of goods sold	200,009,000	130,939,000	517,212,000	430,973,000
Gross margin	25,571,000	26,466,000	80,557,000	52,880,000
General and administrative expenses	6,425,000	361,000	10,284,000	5,669,000
Related-party management services agreement fees	6,196,000	7,439,000	20,832,000	22,998,000
Total general and administrative expenses	12,621,000	7,800,000	31,116,000	28,667,000
Income from operations	12,950,000	18,666,000	49,441,000	24,213,000
Other (expense) income:
Interest expense	(11,950,000)	(9,872,000)	(32,468,000)	(28,701,000)
Other income, net	136,000	58,000	267,000	616,000
Total other expense, net	(11,814,000)	(9,814,000)	(32,201,000)	(28,085,000)
Net income (loss) before income tax benefit	1,136,000	8,852,000	17,240,000	(3,872,000)
Income tax benefit	(275,000)	0	(275,000)	0
Net income (loss)	$ 1,411,000	$ 8,852,000	17,515,000	(3,872,000)
Weighted-average number of limited partner common units outstanding:
Gain (Loss) on Disposition of Assets			$ (1,683,000)	$ (562,000)
Income (Loss) from Continuing Operations, Per Outstanding Limited Partnership and General Partnership Unit, Basic and Diluted, Net of Tax	$ (0.18)	$ 0.15	$ (0.11)	$ (0.44)
Weighted-average common units outstanding—basic and diluted (in units)	39,767	33,457	35,814	31,230
Distribution Per Unit (in dollars per unit)	$ 0.7750	$ 0.6700	$ 2.2200	$ 1.9750
Product sales
Net revenue	$ 216,187,000	$ 155,188,000	$ 569,691,000	$ 478,989,000
Cost of goods sold	179,772,000	117,993,000	468,349,000	395,861,000
Other revenue
Net revenue	$ 9,393,000	$ 2,217,000	$ 28,078,000	$ 4,864,000