Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Open costless collar contracts [Member] | Oil [Member]
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	$ (2,200)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 1 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 06/30/2014
Notional Quantity	8,000,000
Price Floor	90
Price Ceiling	114
Fair Value of Asset (Liability)	44
Open costless collar contracts [Member] | Oil [Member] | Oil contract 2 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 06/30/2014
Notional Quantity	12,000,000
Price Floor	90.00
Price Ceiling	116
Fair Value of Asset (Liability)	67
Open costless collar contracts [Member] | Oil [Member] | Oil contract 3 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	15,000,000
Price Floor	85.00
Price Ceiling	97.50
Fair Value of Asset (Liability)	(309)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 4 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	30,000,000
Price Floor	85.00
Price Ceiling	98.00
Fair Value of Asset (Liability)	(560)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 5 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	12,000,000
Price Floor	85.00
Price Ceiling	100
Fair Value of Asset (Liability)	(90)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 6 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	12,200,000
Price Floor	85.00
Price Ceiling	100
Fair Value of Asset (Liability)	(70)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 7 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	10,000,000
Price Floor	85.00
Price Ceiling	101
Fair Value of Asset (Liability)	(52)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 8 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	15,000,000
Price Floor	87.00
Price Ceiling	97.00
Fair Value of Asset (Liability)	(294)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 9 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	20,000,000
Price Floor	88.00
Price Ceiling	95.60
Fair Value of Asset (Liability)	(536)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 10 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	20,000,000
Price Floor	90.00
Price Ceiling	97.00
Fair Value of Asset (Liability)	(253)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 11 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	12,000,000
Price Floor	90
Price Ceiling	97.90
Fair Value of Asset (Liability)	(80)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 12 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	15,000,000
Price Floor	90.00
Price Ceiling	97.90
Fair Value of Asset (Liability)	(98)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 13 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	15,000,000
Price Floor	90.00
Price Ceiling	98.00
Fair Value of Asset (Liability)	(101)
Open costless collar contracts [Member] | Oil [Member] | Oil contract 14 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	15,000,000
Price Floor	90
Price Ceiling	101
Fair Value of Asset (Liability)	132
Open costless collar contracts [Member] | Natural Gas [Member]
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	(445)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 1 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	100,000,000
Price Floor	3.00
Price Ceiling	5.15
Fair Value of Asset (Liability)	(60)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 2 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	100,000,000
Price Floor	3.25
Price Ceiling	5.21
Fair Value of Asset (Liability)	(34)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 3 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	100,000,000
Price Floor	3.25
Price Ceiling	5.22
Fair Value of Asset (Liability)	(34)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 4 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	100,000,000
Price Floor	3.25
Price Ceiling	5.37
Fair Value of Asset (Liability)	(22)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 5 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	100,000,000
Price Floor	3.25
Price Ceiling	5.42
Fair Value of Asset (Liability)	(18)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 6 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	100,000,000
Price Floor	3.50
Price Ceiling	4.90
Fair Value of Asset (Liability)	(37)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 7 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	100,000,000
Price Floor	3.75
Price Ceiling	4.77
Fair Value of Asset (Liability)	3
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 8 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2015
Notional Quantity	100,000,000
Price Floor	3.75
Price Ceiling	4.36
Fair Value of Asset (Liability)	(237)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 9 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2015
Notional Quantity	100,000,000
Price Floor	3.75
Price Ceiling	4.45
Fair Value of Asset (Liability)	(158)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 10 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2015
Notional Quantity	100,000,000
Price Floor	3.75
Price Ceiling	4.60
Fair Value of Asset (Liability)	(24)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 11 [Member]
Summary of contracts for oil and natural gas
Calculation Period	04/01/2014 - 12/31/2014
Notional Quantity	100,000,000
Price Floor	3.75
Price Ceiling	4.75
Fair Value of Asset (Liability)	6
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 12 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 03/31/2015
Notional Quantity	200,000,000
Price Floor	4.00
Price Ceiling	4.84
Fair Value of Asset (Liability)	(3)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 13 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	100,000,000
Price Floor	3.75
Price Ceiling	4.65
Fair Value of Asset (Liability)	(9)
Open costless collar contracts [Member] | Natural Gas [Member] | Natural Gas contract 14 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	200,000,000
Price Floor	3.75
Price Ceiling	5.04
Fair Value of Asset (Liability)	182
Open Swap Contract [Member]
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	(2,753)
Open Swap Contract [Member] | Natural Gas Liquids [Member]
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	(108)
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Propane contract 1 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	116,000,000
Derivative, Swap Type, Fixed Price	0.950
Fair Value of Asset (Liability)	(247)
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Propane contract 2 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	84,000,000
Derivative, Swap Type, Fixed Price	1.1425
Fair Value of Asset (Liability)	32
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Propane contract 3 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	68,000,000
Derivative, Swap Type, Fixed Price	1.15
Fair Value of Asset (Liability)	32
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Propane contract 4 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	116,000,000
Derivative, Swap Type, Fixed Price	1.0025
Fair Value of Asset (Liability)	(150)
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Propane contract 5 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	60,000,000
Derivative, Swap Type, Fixed Price	1.015
Fair Value of Asset (Liability)	(69)
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Propane contract 6 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	150,000,000
Derivative, Swap Type, Fixed Price	1.00
Fair Value of Asset (Liability)	(58)
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Propane contract 7 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	68,000,000
Derivative, Swap Type, Fixed Price	1.073
Fair Value of Asset (Liability)	33
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Normal Butane contract 1 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	17,500,000
Derivative, Swap Type, Fixed Price	1.540
Fair Value of Asset (Liability)	47
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Normal Butane contract 2 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	45,500,000
Derivative, Swap Type, Fixed Price	1.550
Fair Value of Asset (Liability)	122
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Isobutane contract 1 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	22,000,000
Derivative, Swap Type, Fixed Price	1.640
Fair Value of Asset (Liability)	78
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Isobutane contract 2 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	37,000,000
Derivative, Swap Type, Fixed Price	1.640
Fair Value of Asset (Liability)	140
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Natural Gasoline contract 1 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	30,000,000
Derivative, Swap Type, Fixed Price	1.970
Fair Value of Asset (Liability)	(35)
Open Swap Contract [Member] | Natural Gas Liquids [Member] | Natural Gasoline contract 2 [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2014 - 12/31/2014
Notional Quantity	41,000,000
Derivative, Swap Type, Fixed Price	2.00
Fair Value of Asset (Liability)	$ (33)