Condensed Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Net revenues:
Affiliates (1)	[1]	$ 106,699	$ 62,965
Third party		56,702	89,518
Net revenues		163,401	152,483
Cost of sales:
Cost of materials and other		101,293	96,265
Operating expenses (excluding depreciation and amortization presented below)		13,954	15,307
Depreciation and amortization		5,803	6,124
Total cost of sales		121,050	117,696
Operating expenses (excluding depreciation and amortization presented below)		790	751
General and administrative expenses		6,130	4,473
Depreciation and amortization		496	450
Other operating expense (income), net		(107)	2
Total operating costs and expenses		128,359	123,372
Operating income		35,042	29,111
Interest expense, net		11,824	11,301
Income from equity method investments		(5,553)	(1,951)
Total non-operating expenses, net		6,271	9,350
Income before income tax expense		28,771	19,761
Income tax expense		975	65
Net income attributable to partners		27,796	19,696
Comprehensive income attributable to partners		27,796	19,696
Less: General partner's interest in net income, including incentive distribution rights		9,077	7,270
Limited partners' interest in net income		$ 18,719	$ 12,426
Net income per limited partner unit:
Common units - (basic) (in dollars per share)		$ 0.76	$ 0.51
Common units - (diluted) (in dollars per share)		$ 0.76	$ 0.51
Weighted average limited partner units outstanding:
Common units - (basic) (in shares)		24,480,570	24,407,168
Common units - (diluted) (in shares)		24,485,336	24,416,058
Cash distributions per limited partner unit (in dollars per share)		$ 0.890	$ 0.820

[1] See Note 3 for a description of our material affiliate revenue transactions.