CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ 34,792	$ (31,761)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities:
Depreciation, depletion, and amortization	22,544	10,196
Loss on termination of financing agreements	1,804	0
Non-cash interest expense	4,482	3,877
Change in value of common stock warrants	1,236	(2,820)
Change in value of contingent consideration	0	(9,728)
Deferred taxes	463	(8,573)
Stock-based compensation	4,126	3,479
Unrealized loss (gain) on derivative contracts	3,656	(5,408)
Equity (earnings) losses from Laramie Energy, LLC	(11,098)	18,818
Net changes in operating assets and liabilities:
Trade accounts receivable	21,235	5,554
Prepaid and other assets	40,450	4,828
Inventories	(108,378)	(19,061)
Obligations under inventory financing agreements	69,002	26,936
Accounts payable and other accrued liabilities	(22,117)	(20,313)
Contingent consideration	0	(4,830)
Net cash provided by (used in) operating activities	62,197	(28,806)
Cash flows from investing activities:
Acquisitions of businesses, net of cash acquired	0	(5,000)
Capital expenditures	(11,777)	(11,691)
Proceeds from sale of assets	0	2,323
Investment in Laramie Energy, LLC	0	(55,000)
Net cash used in investing activities	(11,777)	(69,368)
Cash flows from financing activities:
Proceeds from borrowings	176,739	111,550
Repayments of borrowings	(218,022)	(17,138)
Net borrowings (repayments) on deferred payment arrangement	(2,397)	15,597
Payment of deferred loan costs	0	(3,283)
Contingent consideration settlements	0	(11,980)
Other financing activities, net	(348)	(223)
Net cash provided by (used in) financing activities	(44,028)	94,523
Net increase (decrease) in cash and cash equivalents	6,392	(3,651)
Cash and cash equivalents at beginning of period	47,772	167,788
Cash and cash equivalents at end of period	54,164	164,137
Cash received (paid) for:
Interest	(12,614)	(4,342)
Taxes	(410)	138
Non-cash investing and financing activities:
Accrued capital expenditures	$ 1,855	$ 4,542