CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Sales	$ 4,500,538	$ 2,553,327
Cost of sales	4,294,300	2,408,295
Gross profit	206,238	145,032
Costs and operating expenses:
Selling, general and administrative expenses	56,281	46,324
Operating expenses	99,233	80,528
Amortization expense	2,499	2,723
Net gain on sale and disposition of assets	(4,911)	(475)
Total costs and operating expenses	153,102	129,100
Operating income	53,136	15,932
Interest expense	(21,474)	(20,359)
Income before income tax (expense) benefit	31,662	(4,427)
Income tax (expense) benefit	(1,177)	130
Net income (loss)	30,485	(4,297)
Less: General partner's interest in net income (loss), including incentive distribution rights	1,177	739
Preferred Limited Partners
Costs and operating expenses:
Limited partners' interest in net income	3,463	1,820
Common Limited Partners
Costs and operating expenses:
Limited partners' interest in net income	$ 25,845	$ (6,856)
Basic net income (loss) per common limited partner unit	$ 0.76	$ (0.20)
Diluted net income (loss) per common limited partner unit	$ 0.76	$ (0.20)
Basic weighted average common limited partner units outstanding	33,953	33,967
Diluted weighted average common limited partner units outstanding	34,085	34,296