UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH PROVIDED BY OPERATIONS:
Net earnings	$ 4,834	$ 7,437
Adjustments to reconcile net earnings to net cash from operating activities -
Depreciation, depletion and amortization	9,871	12,118
Property sales (gains)	(1,275)	(514)
Dry hole costs incurred	0	33
Impairment of oil and natural gas properties	87	623
Provision for doubtful accounts	93	0
Deferred income taxes	(1,965)	581
Net change in fair value contracts	(124)	(50)
Equity investment (earnings) losses	400	0
Decrease (increase) in accounts receivable	(10,073)	(1,265)
Decrease (increase) in inventories	(5,191)	(3,596)
Decrease (increase) in income tax receivable	2,587	970
Decrease (increase) in prepayments	(1,683)	(215)
Increase (decrease) in accounts payable	7,043	(11,008)
Increase (decrease) in accrued liabilities	1,570	5,259
Other changes, net	(22)	(347)
Net cash provided by (used in) operating activities	6,152	10,026
INVESTING ACTIVITIES:
Property and equipment additions	(4,812)	(4,833)
Proceeds from property sales	2,860	519
Investments	(4,700)	0
Insurance and state collateral (deposits) refunds	1,250	(60)
Net cash (used in) investing activities	(5,402)	(4,374)
FINANCING ACTIVITIES
Dividend payments	(1,856)	(1,856)
Net cash (used in) financing activities	(1,856)	(1,856)
Increase (decrease) in cash and cash equivalents	(1,106)	3,796
Cash and cash equivalents at beginning of period	91,877	80,184
Cash and cash equivalents at end of period	$ 90,771	$ 83,980