UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
CASH PROVIDED BY OPERATIONS:
Net earnings	$ 18,198	$ 6,241
Adjustments to reconcile net earnings to net cash from operating activities -
Depreciation, depletion and amortization	11,370	8,425
Property sale (gains)	(4,035)	(129)
Dry hole costs incurred	1,165	418
Impairment of oil and gas properties	1,208	1,817
Provision for doubtful accounts	750	2
Deferred income taxes	8,703	2,366
Net change in fair value contracts	2,728	(509)
Decrease (increase) in accounts receivable	773	13,190
Decrease (increase) in inventories	(3,824)	649
Decrease (increase) in income tax receivable	2,554	303
Decrease (increase) in prepayments	(1,987)	1,036
Increase (decrease) in accounts payable	15,296	(8,606)
Increase (decrease) in accrued liabilities	4,680	1,375
Other changes, net	(137)	(84)
Net cash provided by operating activities	57,442	26,494
INVESTING ACTIVITIES:
Property and equipment additions	(41,206)	(13,085)
Insurance and state collateral (deposits) refunds	(308)	(45)
Proceeds from property sales	8,032	133
Investment in marketable securities	7,666	0
Redemption of marketable securities	(11,098)	0
Net cash (used in) investing activities	(36,914)	(12,997)
Increase in cash and cash equivalents	20,528	13,497
Cash and cash equivalents at beginning of period	29,032	16,806
Cash and cash equivalents at end of period	$ 49,560	$ 30,303

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).