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CONCENTRATION OF RISK Accounts Receivable, net of Allowance for Doubtful Accounts (Tables)

12 Months Ended

Dec. 31, 2013

Concentration Risks, Types, No Concentration Percentage [Abstract]

Account Receivable, net of Allowance for Doubtful Accounts [Table Text Block]

Accounts Receivable. The following table presents the components of accounts receivable, net of allowance for doubtful accounts:



	As of December 31,
	2013			2012
	(in thousands)

Crude oil, natural gas and NGLs sales	$	66,257		$	39,837
Joint interest billings	20,558			6,896
Natural gas marketing	6,210			8,209
Reimbursements for title defects	—			7,579
Other	2,321			3,385
Allowance for doubtful accounts	(1,261		)	(1,026		)
Accounts receivable, net	$	94,085		$	64,880

Individual Customers Constituting 10% or more of Total Revenue [Table Text Block]

Major Customers. The following table presents the individual customers constituting 10% or more of total revenues:



	Year Ended December 31,
Customer	2013		2012		2011

Suncor Energy Marketing, Inc.	31.3	%	29.8	%	25.7	%
DCP Midstream, LP	14.6	%	12.2	%	11.5	%

Fair Value, Concentration of Risk [Table Text Block]

The following table presents the counterparties that expose us to credit risk as of December 31, 2013, with regard to our derivative assets:



	Fair Value of Derivative Assets
Counterparty Name	As of December 31, 2013
	(in thousands)

Wells Fargo Bank, N.A. (1)	$	2,496
Bank of Montreal (1)	1,102
Canadian Imperial Bank of Commerce (1)	1,054
Other lenders in our revolving credit facility	3,380
Various (2)	141
Total	$	8,173

____________

(1)Major lender in our revolving credit facility. See Note 8, Long-Term Debt.

(2)Represents a total of 19 counterparties.

- Definition

Tabular disclosure of all significant concentrations of risk, including credit risk and market risk, arising from all financial instruments (as defined), whether from an individual counterparty or groups of counterparties. The disclosure concerning concentrations of risk may consist of the following information: (1) for concentrations of credit risk disclosure may include: (a) information about the (shared) activity, region, or economic characteristic that identifies the concentration, (b) the maximum amount of loss due to credit risk that, based on the gross fair value of the financial instrument, the entity would incur if parties to the financial instruments that make up the concentration failed completely to perform according to the terms of the contracts and the collateral or other security, if any, for the amount due proved to be of no value to the entity, (c) the policy of requiring collateral or other security to support financial instruments subject to credit risk, information about the entity's access to that collateral or other security, and the nature and a brief description of the collateral or other security supporting those financial instruments, and (d) the policy of entering into master netting arrangements to mitigate the credit risk of financial instruments, information about the arrangements for which the entity is a party, and a brief description of the terms of those arrangements, including the extent to which they would reduce the entity's maximum amount of loss due to credit risk and (2) for disclosure of quantitative information about the market risks of financial instruments that is consistent with the way the company manages or adjusts those risks, disclosure may include: (a) more details about current positions and perhaps activity during the period, (b) the hypothetical effects on comprehensive income (or net assets), or annual income, of several possible changes in market prices, (c) a gap analysis of interest rate re-pricing or maturity dates, (d) the duration of the financial instruments, (e) the entity's value at risk from derivatives and from other positions at the end of the reporting period and the average value at risk during the year, or (f) other ways of reporting quantitative information as internally developed.

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