Derivative Financial Instruments (Schedule of Derivative Instruments) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments Not Designated as Hedging Instruments, Type			Commodity swap contracts
Line Item in Financial Statements for Gain (Loss) on Hybrid Instruments			Other income, net
Derivative Instruments Not Designated as Hedging Instruments, Gain	$ 8,419	$ 0	$ 8,419	$ 0