UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH PROVIDED BY OPERATIONS:
Net (loss) earnings	$ (860)	$ 1,430
Adjustments to reconcile net earnings to net cash from operating activities -
Depreciation, depletion and amortization	3,969	5,115
Property sales loss (gains)	7	(120)
Impairment of oil and natural gas properties	3	29
Deferred income taxes	60	(1,352)
Net change in fair value contracts	(420)	158
Equity investment losses	0	191
(Increase) in accounts receivable	(1,968)	(1,224)
(Increase) in inventories	(7,557)	(5,707)
Decrease (increase) in income tax receivable	(736)	1,958
Decrease in prepayments	744	338
Increase (decrease) in accounts payable	17,746	(3,614)
Increase in accrued liabilities	1,084	393
Other changes, net	78	47
Net cash provided by (used in) operating activities	12,150	(2,358)
INVESTING ACTIVITIES:
Property and equipment additions	(1,006)	(4,210)
Proceeds from property sales	39	920
Investments	0	(2,200)
Insurance and state collateral (deposits) refunds	476	(2)
Net cash used in investing activities	(491)	(5,492)
FINANCING ACTIVITIES
Dividend payments	(928)	(928)
Net cash used in financing activities	(928)	(928)
Increase (decrease) in cash and cash equivalents	10,731	(8,778)
Cash and cash equivalents at beginning of period	87,342	91,877
Cash and cash equivalents at end of period	$ 98,073	$ 83,099