UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH PROVIDED BY OPERATIONS:
Net earnings	$ 14,345	$ 11,961
Adjustments to reconcile net earnings to net cash from operating activities -
Depreciation, depletion and amortization	10,921	9,189
Property sale (gains)	(84)	(2,982)
Dry hole costs incurred	105	41
Impairment of oil and gas properties	242	629
Provision for doubtful accounts	36	(49)
Deferred income taxes	1,352	425
Net change in fair value contracts	2	993
Decrease (increase) in accounts receivable	(20,185)	44,124
Decrease (increase) in inventories	5,302	1,642
Decrease (increase) in income tax receivable	(891)	417
Decrease (increase) in prepayments	(739)	1,568
Increase (decrease) in accounts payable	(10,086)	(52,968)
Increase (decrease) in accrued liabilities	3,328	6,362
Other changes, net	339	196
Net cash provided by operating activities	3,987	21,548
INVESTING ACTIVITIES:
Property and equipment additions	(16,298)	(31,610)
Insurance and state collateral (deposits) refunds	(17)	257
Proceeds from property sales	231	1,406
Proceeds from the sale of discontinued operations	0	3,546
Net cash (used in) investing activities	(16,084)	(26,401)
FINANCING ACTIVITIES:
Dividend payments	(928)	0
Net cash (used in) financing activities	(928)	0
Increase (decrease) in cash and cash equivalents	(13,025)	(4,853)
Cash and cash equivalents at beginning of period	47,239	37,066
Cash and cash equivalents at end of period	$ 34,214	$ 32,213