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Fair Value Measurements | 6 Months Ended
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Jun. 30, 2013
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements The Company measures and reports certain assets and liabilities on a fair value basis and has classified and disclosed its fair value measurements using the following levels of the fair value hierarchy:
Level 1 | Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities.
Level 2 | Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability.
Level 3 | Measurement based on prices or valuation models that require inputs that are both significant to the fair value measurement and less observable for objective sources (i.e., supported by little or no market activity).
Assets and liabilities that are measured at fair value are classified based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment, which may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels. The determination of the fair values, stated below, considers the market for the Company’s financial assets and liabilities, the associated credit risk and other factors. The Company considers active markets as those in which transactions for the assets or liabilities occur in sufficient frequency and volume to provide pricing information on an ongoing basis. The Company has assets and liabilities classified in each level of the hierarchy, as described below. Level 1 Fair Value Measurements Restricted deposits. The fair value of restricted deposits invested in mutual funds or municipal bonds is based on quoted market prices. For restricted deposits held in savings accounts, carrying value approximates fair value. Restricted deposits are included in other assets in the accompanying unaudited condensed consolidated balance sheets. Investments. The fair value of investments, consisting of assets attributable to the Company’s non-qualified deferred compensation plan, is based on quoted market prices. Investments are included in other assets in the accompanying unaudited condensed consolidated balance sheets. Level 2 Fair Value Measurements Derivative contracts. The fair values of the Company’s oil and natural gas fixed price swaps, oil and natural gas collars and interest rate swap are based upon inputs that are either readily available in the public market, such as oil and natural gas futures prices, volatility factors, interest rates and discount rates, or can be corroborated from active markets. Fair value is determined through the use of a discounted cash flow model or option pricing model using the applicable inputs, discussed above. The Company applies a weighted average credit default risk rating factor for its counterparties or gives effect to its credit default risk rating, as applicable, in determining the fair value of these derivative contracts. Credit default risk ratings are based on current published credit default swap rates. Level 3 Fair Value Measurements Derivative contracts. The fair value of the Company’s oil basis swaps outstanding at December 31, 2012 was based upon quotes obtained from counterparties to the derivative contracts. These values were reviewed internally for reasonableness through the use of a discounted cash flow model using non-exchange traded regional pricing information. Additionally, the Company applied a weighted average credit default risk rating factor for its counterparties or gave effect to its credit risk, as applicable, in determining the fair value of these derivative contracts. The significant unobservable input used in the fair value measurement of the Company’s oil basis swaps was the estimate of future oil basis differentials. Significant increases (decreases) in oil basis differentials could result in a significantly higher (lower) fair value measurement. The significant unobservable inputs and the range and weighted average of these inputs used in the fair value measurements of the Company’s oil basis swaps at December 31, 2012 are included in the table below. All of the outstanding oil basis swaps at December 31, 2012 contractually matured during the six month-period ended June 30, 2013.
Unobservable Input |  | Range |  | Weighted Average |  | Fair Value
|  | (price per Bbl) |  | (price per Bbl) |  | (in thousands)
Oil basis differential forward curve |  | $10.00 | – | $21.98 |  | $14.74 |  | $ | (512 | )
The following tables summarize the Company’s assets and liabilities measured at fair value on a recurring basis by the fair value hierarchy (in thousands): June 30, 2013
| Fair Value Measurements |  | Netting(1) |  | Assets/Liabilities at Fair Value
| Level 1 |  | Level 2 |  | Level 3 |  |
Assets |  |  |  |  |  |  |  |  |
Restricted deposits | $ | 27,953 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 27,953 |
Commodity derivative contracts | — |  |  | 137,484 |  |  | — |  |  | (40,887 | ) |  | 96,597 |
Investments | 11,385 |  |  | — |  |  | — |  |  | — |  |  | 11,385 |
| $ | 39,338 |  |  | $ | 137,484 |  |  | $ | — |  |  | $ | (40,887 | ) |  | $ | 135,935 |
Liabilities |  |  |  |  |  |  |  |  |
Commodity derivative contracts | $ | — |  |  | $ | 54,402 |  |  | $ | — |  |  | $ | (40,887 | ) |  | $ | 13,515 |
| $ | — |  |  | $ | 54,402 |  |  | $ | — |  |  | $ | (40,887 | ) |  | $ | 13,515 |
December 31, 2012
| Fair Value Measurements |  | Netting(1) |  | Assets/Liabilities at Fair Value
| Level 1 |  | Level 2 |  | Level 3 |  |
Assets |  |  |  |  |  |  |  |  |
Restricted deposits | $ | 27,947 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 27,947 |
Commodity derivative contracts | — |  |  | 130,220 |  |  | 183 |  |  | (35,764 | ) |  | 94,639 |
Investments | 10,348 |  |  | — |  |  | — |  |  | — |  |  | 10,348 |
| $ | 38,295 |  |  | $ | 130,220 |  |  | $ | 183 |  |  | $ | (35,764 | ) |  | $ | 132,934 |
Liabilities |  |  |  |  |  |  |  |  |
Commodity derivative contracts | $ | — |  |  | $ | 107,321 |  |  | $ | 695 |  |  | $ | (35,764 | ) |  | $ | 72,252 |
Interest rate swap | — |  |  | 2,395 |  |  | — |  |  | — |  |  | 2,395 |
| $ | — |  |  | $ | 109,716 |  |  | $ | 695 |  |  | $ | (35,764 | ) |  | $ | 74,647 |
____________________ (1)Represents the impact of netting assets and liabilities with counterparties with which the right of offset exists. The table below sets forth a reconciliation of the Company’s commodity derivative contracts measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three and six-month periods ended June 30, 2013 and 2012 (in thousands):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2013 |  | 2012 |  | 2013 |  | 2012
Beginning balance of Level 3 |  | $ | (211 | ) |  | $ | (2,675 | ) |  | $ | (512 | ) |  | $ | (4,253 | )
Total realized and unrealized gains (losses) |  | 740 |  |  | (1,643 | ) |  | (133 | ) |  | 389 |
Purchases |  | — |  |  | 5,697 |  |  | — |  |  | 5,697 |
Settlements (received) paid |  | (529 | ) |  | 3,634 |  |  | 645 |  |  | 3,180 |
Ending balance of Level 3 |  | $ | — |  |  | $ | 5,013 |  |  | $ | — |  |  | $ | 5,013 |
The Company’s policy is to recognize transfers between fair value hierarchy levels as of the end of the quarterly reporting period in which the event or change in circumstances causing the transfer occurred. During the three and six-month periods ended June 30, 2013 and 2012, the Company did not have any transfers between levels. Unrealized (gains) losses on the Company’s Level 3 commodity derivative contracts outstanding at June 30, 2012 were $(1.4) million and $0.2 million for the three and six-month periods ended June 30, 2012, respectively. These amounts have been included in gain on derivative contracts in the accompanying unaudited condensed consolidated statements of operations. There were no outstanding Level 3 commodity derivative contracts at June 30, 2013. See Note 9 for further discussion of the Company’s derivative contracts. Fair Value of Financial Instruments The Company measures the fair value of its senior notes using pricing for the Company’s senior notes that is readily available in the public market. The Company classifies these inputs as Level 2 in the fair value hierarchy. The estimated fair values and carrying values of the Company’s senior notes at June 30, 2013 and December 31, 2012 were as follows (in thousands):
| June 30, 2013 |  | December 31, 2012
| Fair Value |  | Carrying Value |  | Fair Value |  | Carrying Value
9.875% Senior Notes due 2016(1) | $ | — |  |  | $ | — |  |  | $ | 392,913 |  |  | $ | 356,657 |
8.0% Senior Notes due 2018 | — |  |  | — |  |  | 790,313 |  |  | 750,000 |
8.75% Senior Notes due 2020(2) | 457,875 |  |  | 444,425 |  |  | 490,500 |  |  | 444,127 |
7.5% Senior Notes due 2021(3) | 1,116,250 |  |  | 1,179,128 |  |  | 1,257,250 |  |  | 1,179,328 |
8.125% Senior Notes due 2022 | 742,500 |  |  | 750,000 |  |  | 823,125 |  |  | 750,000 |
7.5% Senior Notes due 2023(4) | 781,688 |  |  | 821,107 |  |  | 882,750 |  |  | 820,971 |
____________________ (1)Carrying value is net of $8,843 discount at December 31, 2012. (2)Carrying value is net of $5,575 and $5,873 discount at June 30, 2013 and December 31, 2012, respectively.
(3) | Carrying value includes a premium, applicable to notes issued in August 2012, of $4,128 and $4,328 at June 30, 2013 and December 31, 2012, respectively.
(4)Carrying value is net of $3,893 and $4,029 discount at June 30, 2013 and December 31, 2012, respectively. See Note 8 for discussion of the Company’s long-term debt, including the redemption of all of the outstanding 9.875% Senior Notes due 2016 and 8.0% Senior Notes due 2018 in March 2013.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15A -Subparagraph a-d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 15C, 15D -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 107 -Paragraph 3, 10, 14, 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32, 33, 34 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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