Derivative Financial Instruments (Details 1) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) gal / mo $ / Gallons
Open swap contracts for natural gas liquid
Fair Value of Asset (Liability)	$ 30,193
NGL | Open Swap Contract
Open swap contracts for natural gas liquid
Fair Value of Asset (Liability)	$ 530
NGL | Open Swap Contract | NGL Propane Swap Contract, 150,000 Notional Amount, 1.000 Fixed Price
Open swap contracts for natural gas liquid
Calculation Period	10/01/2015 - 12/31/2015
Notional Quantity | gal / mo	150,000
Fixed Price | $ / Gallons	1.000
Fair Value of Asset (Liability)	$ 239
NGL | Open Swap Contract | NGL Propane Swap Contract, 100,000 Notional Amount, 1.030 Fixed Price
Open swap contracts for natural gas liquid
Calculation Period	10/01/2015 - 12/31/2015
Notional Quantity | gal / mo	100,000
Fixed Price | $ / Gallons	1.03
Fair Value of Asset (Liability)	$ 168
NGL | Open Swap Contract | NGL Propane Swap Contract, 68,000 Notional Amount, 1.073 Fixed Price
Open swap contracts for natural gas liquid
Calculation Period	10/01/2015 - 12/31/2015
Notional Quantity | gal / mo	68,000
Fixed Price | $ / Gallons	1.073
Fair Value of Asset (Liability)	$ 123