Derivative Financial Instruments (Details 1) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Open swap contracts for natural gas liquid
Fair Value of Asset (Liability)	$ 7,180
NGL's [Member] | Open Swap Contract [Member]
Open swap contracts for natural gas liquid
Fair Value of Asset (Liability)	1,801
NGL's [Member] | Open Swap Contract [Member] | NGL Purity Ethane Swap Contract, 110,000 Notional Amount, 0.335 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	110,000
Fixed Price	0.335
Fair Value of Asset (Liability)	57
NGL's [Member] | Open Swap Contract [Member] | NGL Purity Ethane Swap Contract, 110,000 Notional Amount, 0.355 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	110,000
Fixed Price	0.355
Fair Value of Asset (Liability)	71
NGL's [Member] | Open Swap Contract [Member] | NGL Propane Swap Contract, 53,000 Notional Amount, 0.953 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	53,000
Fixed Price	0.953
Fair Value of Asset (Liability)	30
NGL's [Member] | Open Swap Contract [Member] | NGL Propane Swap Contract, 106,000 Notional Amount, 0.960 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	106,000
Fixed Price	0.960
Fair Value of Asset (Liability)	65
NGL's [Member] | Open Swap Contract [Member] | NGL Propane Swap Contract, 53,000 Notional Amount, 1.001 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	53,000
Fixed Price	1.001
Fair Value of Asset (Liability)	45
NGL's [Member] | Open Swap Contract [Member] | NGL Propane Swap Contract, 116,000 Notional Amount, 0.950 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	116,000
Fixed Price	0.950
Fair Value of Asset (Liability)	141
NGL's [Member] | Open Swap Contract [Member] | NGL Normal Butane Swap Contract, 14,700 Notional Amount, 1.455 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	14,700
Fixed Price	1.455
Fair Value of Asset (Liability)	22
NGL's [Member] | Open Swap Contract [Member] | NGL Normal Butane Swap Contract, 14,700 Notional Amount, 1.560 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	14,700
Fixed Price	1.56
Fair Value of Asset (Liability)	32
NGL's [Member] | Open Swap Contract [Member] | NGL Normal Butane Swap Contract, 21,000 Notional Amount, 1.575 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	21,000
Fixed Price	1.575
Fair Value of Asset (Liability)	47
NGL's [Member] | Open Swap Contract [Member] | NGL Normal Butane Swap Contract, 117,000 Notional Amount, 1.575 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	117,000
Fixed Price	1.575
Fair Value of Asset (Liability)	268
NGL's [Member] | Open Swap Contract [Member] | NGL Normal Butane Swap Contract, 17,500 Notional Amount, 1.540 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	17,500
Fixed Price	1.540
Fair Value of Asset (Liability)	75
NGL's [Member] | Open Swap Contract [Member] | NGL Normal Butane Swap Contract, 45,500 Notional Amount, 1.550 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	45,500
Fixed Price	1.550
Fair Value of Asset (Liability)	211
NGL's [Member] | Open Swap Contract [Member] | NGL Isobutane Swap Contract, 7,000 Notional Amount, 1.515 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	7,000
Fixed Price	1.515
Fair Value of Asset (Liability)	11
NGL's [Member] | Open Swap Contract [Member] | NGL Isobutane Swap Contract, 7,000 Notional Amount, 1.625 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	7,000
Fixed Price	1.625
Fair Value of Asset (Liability)	16
NGL's [Member] | Open Swap Contract [Member] | NGL Isobutane Swap Contract, 43,000 Notional Amount, 1.675 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	43,500
Fixed Price	1.675
Fair Value of Asset (Liability)	110
NGL's [Member] | Open Swap Contract [Member] | NGL Isobutane Swap Contract, 23,000 Notional Amount, 1.675 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	23,000
Fixed Price	1.675
Fair Value of Asset (Liability)	62
NGL's [Member] | Open Swap Contract [Member] | NGL Isobutane Swap Contract, 22,000 Notional Amount, 1.640 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	22,000
Fixed Price	1.640
Fair Value of Asset (Liability)	114
NGL's [Member] | Open Swap Contract [Member] | NGL Isobutane Swap Contract, 37,000 Notional Amount, 1.640 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	37,000
Fixed Price	1.640
Fair Value of Asset (Liability)	184
NGL's [Member] | Open Swap Contract [Member] | NGL Natural Gasoline Swap Contract, 12,000 Notional Amount, 2.025 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	12,000
Fixed Price	2.025
Fair Value of Asset (Liability)	4
NGL's [Member] | Open Swap Contract [Member] | NGL Natural Gasoline Swap Contract, 12,000 Notional Amount, 2.085 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	12,000
Fixed Price	2.085
Fair Value of Asset (Liability)	8
NGL's [Member] | Open Swap Contract [Member] | NGL Natural Gasoline Swap Contract, 12,000 Notional Amount, 2.102 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	12,000
Fixed Price	2.102
Fair Value of Asset (Liability)	9
NGL's [Member] | Open Swap Contract [Member] | NGL Natural Gasoline Swap Contract, 36,000 Notional Amount, 2.105 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	36,000
Fixed Price	2.105
Fair Value of Asset (Liability)	29
NGL's [Member] | Open Swap Contract [Member] | NGL Natural Gasoline Swap Contract, 90,500 Notional Amount, 2.148 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	07/01/2013 - 12/31/2013
Notional Quantity	90,500
Fixed Price	2.148
Fair Value of Asset (Liability)	98
NGL's [Member] | Open Swap Contract [Member] | NGL Natural Gasoline Swap Contract, 30,000 Notional Amount, 1.970 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	30,000
Fixed Price	1.970
Fair Value of Asset (Liability)	32
NGL's [Member] | Open Swap Contract [Member] | NGL Natural Gasoline Swap Contract, 41,000 Notional Amount, 2.000 Fixed Price [Member]
Open swap contracts for natural gas liquid
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	41,000
Fixed Price	2.00
Fair Value of Asset (Liability)	$ 60