CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ 53,616	$ (59,522)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities:
Depreciation, depletion, and amortization	33,848	19,839
Loss on termination of financing agreements	1,804	0
Non-cash interest expense	6,189	11,426
Change in value of common stock warrants	2,211	(3,477)
Change in value of contingent consideration	0	(10,753)
Deferred taxes	462	(8,565)
Stock-based compensation	5,803	5,103
Unrealized loss (gain) on derivative contracts	557	(5,804)
Equity (earnings) losses from Laramie Energy, LLC	(11,651)	15,159
Net changes in operating assets and liabilities:
Trade accounts receivable	12,070	3,233
Prepaid and other assets	46,747	29,258
Inventories	(121,040)	50,390
Deferred turnaround expenditures	0	(34,969)
Obligations under inventory financing agreements	89,549	(11,795)
Accounts payable and other accrued liabilities	(14,709)	(35,941)
Contingent consideration	0	(4,830)
Net cash provided by (used in) operating activities	105,456	(41,248)
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	0	(209,183)
Capital expenditures	(19,888)	(19,276)
Proceeds from sale of assets	19	2,323
Change in restricted cash	502	(10,000)
Investment in Laramie Energy, LLC	0	(55,000)
Net cash used in investing activities	(19,367)	(291,136)
Cash flows from financing activities:
Proceeds from sale of common stock, net of offering costs	0	49,315
Proceeds from borrowings	239,538	301,782
Repayments of borrowings	(292,684)	(137,791)
Net borrowings (repayments) on deferred payment arrangement	(1,493)	26,654
Payment of deferred loan costs	(50)	(6,805)
Contingent consideration settlements	0	(11,980)
Other financing activities, net	(872)	(325)
Net cash provided by (used in) financing activities	(55,561)	220,850
Net increase (decrease) in cash and cash equivalents	30,528	(111,534)
Cash and cash equivalents at beginning of period	47,772	167,788
Cash and cash equivalents at end of period	78,300	56,254
Net cash received (paid) for:
Interest	(15,168)	(7,573)
Taxes	(1,115)	139
Non-cash investing and financing activities:
Accrued capital expenditures	4,469	2,583
Value of warrants and debt reclassified to equity	$ 0	$ 3,084