Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value

A financial instrument’s categorization within the valuation hierarchy is based upon 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 in its entirety requires judgment and considers factors specific to the asset or liability. The Company is further required to assess the creditworthiness of the counter-party to the derivative contract. The results of the assessment of non-performance risk, based on the counter-party’s credit risk, could result in an adjustment of the carrying value of the derivative instrument. The following tables sets forth information about the Company’s assets and liabilities measured at fair value on a recurring basis as of December 31, 2013 and 2014, and indicate the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value (in thousands):

	Quoted Prices  in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs  (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of December 31, 2013
Assets:
NYMEX Fixed Price Derivative contracts	$	—	$	1,010	$	—	$	1,010
Total Assets	$	—	$	1,010	$	—	$	1,010
Liabilities:
NYMEX Fixed Price Derivative contracts	$	—	$	5,002	$	—	$	5,002
Total Liabilities	$	—	$	5,002	$	—	$	5,002

	Quoted Prices  in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs  (Level 2)		Significant Unobservable Inputs (Level 3)		Balance as of December 31, 2014
Assets:
NYMEX Fixed Price Derivative contracts	$	—	$	23,195	$	—	$	23,195
Total Assets	$	—	$	23,195	$	—	$	23,195
Liabilities:
NYMEX Fixed Price Derivative contracts	$	—	$	13	$	—	$	13
Total Liabilities	$	—	$	13	$	—	$	13