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Fair Value Measurements
12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS

8.  FAIR VALUE MEASUREMENTS:

As required by FASB ASC Topic 820, Fair Value Measurements and Disclosures (“FASB ASC 820”), the Company defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and establishes a three level hierarchy for measuring fair value. Fair value measurements are classified and disclosed in one of the following categories:

Level 1: Quoted prices (unadjusted) in active markets for identical assets and liabilities that we have the ability to access at the measurement date.

Level 2: Inputs other than quoted prices included within Level 1 that are either directly or indirectly observable for the asset or liability, including quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in inactive markets, inputs other than quoted prices that are observable for the asset or liability, and inputs that are derived from observable market data by correlation or other means. Instruments categorized in Level 2 include non-exchange traded derivatives such as over-the-counter forwards and swaps.

Level 3: Unobservable inputs for the asset or liability, including situations where there is little, if any, market activity for the asset or liability.

The valuation assumptions the Company has used to measure the fair value of its commodity derivatives were observable inputs based on market data obtained from independent sources and are considered Level 2 inputs (quoted prices for similar assets, liabilities (adjusted) and market-corroborated inputs).

Assets and Liabilities Measured on a Non-recurring Basis

The Company uses fair value to determine the value of its asset retirement obligations. The inputs used to determine such fair value under the expected present value technique are primarily based upon internal estimates prepared by reservoir engineers for costs of dismantlement, removal, site reclamation and similar activities associated with the Company’s oil and gas properties and would be classified Level 3 inputs.

Fair Value of Financial Instruments

The estimated fair value of financial instruments is the amount at which the instrument could be exchanged currently between willing parties. The carrying amounts reported in the Consolidated Balance Sheets for cash and cash equivalents, accounts receivable, and accounts payable approximate fair value due to the immediate or short-term maturity of these financial instruments. The carrying amount of floating-rate debt approximates fair value because the interest rates are variable and reflective of market rates. We use available market data and valuation methodologies to estimate the fair value of our fixed rate debt and the fair values presented in the tables below reflect original maturity dates for each of the debt instruments. The inputs utilized to estimate the fair value of the Company’s fixed rate debt are considered Level 2 fair value inputs. This disclosure is presented in accordance with FASB ASC Topic 825, Financial Instruments, and does not impact our financial position, results of operations or cash flows.

December 31, 2015December 31, 2014
CarryingEstimatedCarryingEstimated
AmountFair ValueAmountFair Value
5.45% Notes due March 2015, issued 2008$-$-$100,000$101,931
7.31% Notes due March 2016, issued 200962,00063,60462,00065,027
4.98% Notes due January 2017, issued 2010116,000113,420116,000116,240
5.92% Notes due March 2018, issued 2008200,000191,985200,000203,738
5.75% Notes due December 2018, issued 2013450,000111,451450,000414,505
7.77% Notes due March 2019, issued 2009173,000174,488173,000187,105
5.50% Notes due January 2020, issued 2010207,000185,052207,000201,371
4.51% Notes due October 2020, issued 2010315,000258,520315,000283,335
5.60% Notes due January 2022, issued 201087,00073,03487,00082,581
4.66% Notes due October 2022, issued 201035,00025,55835,00030,476
6.125% Notes due October 2024, issued 2014850,000206,321850,000754,485
5.85% Notes due January 2025, issued 201090,00070,75690,00083,876
4.91% Notes due October 2025, issued 2010175,000115,911175,000147,649
Credit Facility due October 2016630,000630,000518,000518,000
$3,390,000$2,220,100$3,378,000$3,190,319