Derivative Financial Instruments (Derivative Instruments, Gain (Loss) (Details)	9 Months Ended
	Sep. 30, 2014 MMBTuPerDay
Product One [Member]
Derivative [Line Items]
Derivative Volume	500
Derivative, Swap Type, Average Fixed Price	3.980
Product One [Member] | Contract Start Date [Member]
Derivative [Line Items]
Derivative, Inception Date	Nov. 01, 2014
Product One [Member] | Contract End Date [Member]
Derivative [Line Items]
Derivative, Inception Date	Mar. 31, 2015
Product Two [Member]
Derivative [Line Items]
Derivative Volume	500
Derivative, Swap Type, Average Fixed Price	4.075
Product Two [Member] | Contract Start Date [Member]
Derivative [Line Items]
Derivative, Inception Date	Nov. 01, 2014
Product Two [Member] | Contract End Date [Member]
Derivative [Line Items]
Derivative, Inception Date	Mar. 31, 2015