CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 89,261	$ 31,363
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, depletion, and amortization	42,876	25,812
Debt extinguishment and commitment costs	9,186	0
Non-cash interest expense	4,968	3,603
Change in value of common stock warrants	2,239	(671)
Deferred taxes	(67,129)	31
Stock-based compensation	3,198	3,103
Unrealized loss on derivative contracts	21,086	4,878
Equity earnings from Laramie Energy, LLC	(792)	(3,224)
Net changes in operating assets and liabilities:
Trade accounts receivable	(60,680)	(10,604)
Prepaid and other assets	12,029	(72,043)
Inventories	(154,878)	15,894
Deferred turnaround expenditures	(1,894)	0
Obligations under inventory financing agreements	74,287	22,311
Accounts payable, other accrued liabilities, and operating lease assets and liabilities	50,480	10,874
Net cash provided by operating activities	24,237	31,327
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	(274,291)	(74,331)
Proceeds from purchase price settlement related to asset acquisition	3,226	0
Capital expenditures	(41,404)	(17,657)
Other investing activities	188	797
Net cash used in investing activities	(312,281)	(91,191)
Cash flows from financing activities:
Proceeds from borrowings	450,505	106,500
Repayments of borrowings	(180,541)	(111,844)
Net borrowings on deferred payment arrangements and receivable advances	71,447	30,213
Payment of deferred loan costs	(13,413)	(72)
Payments for debt extinguishment and commitment costs	(7,142)	0
Other financing activities, net	6	(564)
Net cash provided by financing activities	320,862	24,233
Net increase (decrease) in cash, cash equivalents, and restricted cash	32,818	(35,631)
Cash, cash equivalents, and restricted cash at beginning of period	75,819	119,077
Cash, cash equivalents, and restricted cash at end of period	108,637	83,446
Net cash received (paid) for:
Interest paid	(26,740)	(12,012)
Taxes	(3,966)	0
Non-cash investing and financing activities:
Accrued capital expenditures	8,085	2,145
Common stock issued for business combination	36,980	0
Common stock issued to repurchase convertible notes	$ 30,055	$ 0