CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net Income (Loss)	$ (262,897)	$ 89,261
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation, depletion, and amortization	43,411	42,876
Impairment expense	67,922	0
Debt extinguishment and commitment costs	0	9,186
Non-cash interest expense	3,261	4,968
Non-cash lower of cost or net realizable value adjustment	24,015	9,667
Change in value of common stock warrants	(4,270)	2,239
Deferred taxes	(21,088)	(67,129)
Stock-based compensation	3,537	3,198
Unrealized loss on derivative contracts	2,048	21,086
Equity (earnings) losses from Laramie Energy, LLC	46,905	(792)
Net changes in operating assets and liabilities:
Trade accounts receivable	114,219	(60,680)
Prepaid and other assets	28,241	12,029
Inventories	164,178	(164,545)
Deferred turnaround expenditures	(6,399)	(1,894)
Obligations under inventory financing agreements	(150,358)	74,287
Accounts payable, other accrued liabilities, and operating lease ROU assets and liabilities	(18,958)	50,480
Net cash provided by operating activities	33,767	24,237
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	0	(274,291)
Proceeds from purchase price settlement related to asset acquisition	0	3,226
Capital expenditures	(30,165)	(41,404)
Other investing activities	5	188
Net cash used in investing activities	(30,160)	(312,281)
Cash flows from financing activities:
Proceeds from borrowings	180,950	450,505
Repayments of borrowings	(88,208)	(180,541)
Net borrowings (repayments) on deferred payment arrangements and receivable advances	(72,506)	71,447
Payment of deferred loan costs	(6,055)	(13,413)
Payments for debt extinguishment and commitment costs	0	(7,142)
Other financing activities, net	(934)	6
Net cash provided by financing activities	13,247	320,862
Net increase in cash, cash equivalents, and restricted cash	16,854	32,818
Cash, cash equivalents, and restricted cash at beginning of period	128,428	75,819
Cash, cash equivalents, and restricted cash at end of period	145,282	108,637
Net cash received (paid) for:
Interest	(28,950)	(26,740)
Taxes	240	(3,966)
Non-cash investing and financing activities:
Accrued capital expenditures	5,060	8,085
Value of warrants reclassified to equity	3,936	0
ROU assets obtained in exchange for new finance lease liabilities	1,915	192
ROU assets obtained in exchange for new operating lease liabilities	4,557	14,308
ROU assets terminated in exchange for release from operating lease liabilities	7,738	193
Common stock issued for business combination	0	36,980
Common stock issued to repurchase convertible notes	$ 0	$ 30,055