Supplemental Cash Flow Disclosure (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Cash paid during the period for:
Interest payments	$ 384	$ 170
Non-cash transactions:
Increase in net asset retirement obligations due to additions	10	102
Various assets acquired and liabilities assumed in acquisition (see Note 4)		6,635
Decrease in accounts payable and accrued liabilities included in oil and gas properties	(993)	(194)
Offering costs included in accounts payable		1,756
Net assets transferred from oil and gas properties to investment in affiliate		$ 463

The amount of debt issuance costs that were incurred during a noncash or partial noncash transaction.

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The net book value of a nonmonetary asset transferred or exchanged in connection with the acquisition of a business or asset in a noncash transaction. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Nonmonetary assets and liabilities are assets and liabilities that will not result in cash receipts or cash payments in the future.

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- Definition

Value of investments transferred to the entity's investments in noncash transactions.

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