Fair Value (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value [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 March 31, 2013 and December 31, 2012, 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 March 31, 2013
Assets:
Investment in common stock	$	71	$	—	$	—	$	71
NYMEX Fixed Price Derivative contracts		—		473		—		473
Total Assets	$	71	$	473	$	—	$	544
Liabilities:
NYMEX Fixed Price Derivative contracts	$	—	$	7,460	$	—	$	7,460
Total Liabilities	$	—	$	7,460	$	—	$	7,460

	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, 2012
Assets:
Investment in common stock	$	78	$	—	$	—	$	78
NYMEX Fixed Price Derivative contracts		—		635		—		635
Total Assets	$	78	$	635	$	—	$	713
Liabilities:
NYMEX Fixed Price Derivative contracts	$	—	$	7,030	$	—	$	7,030
Total Liabilities	$	—	$	7,030	$	—	$	7,030