Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	$ (11,096)
Open costless collar contracts [Member] | Oil [Member]
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	(9,947)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 10,000 Notional Amount, 85 Price Floor, 100.55 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	10,000
Price Floor	85.00
Price Ceiling	100.55
Fair Value of Asset (Liability)	(260)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 12,200 Notional Amount, 85 Price Floor, 100.40 Price Ceiling [Member] [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	12,200
Price Floor	85.00
Price Ceiling	100.40
Fair Value of Asset (Liability)	(326)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 15,000 Notional Amount, 85 Price Floor, 97.50 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	15,000
Price Floor	85.00
Price Ceiling	97.50
Fair Value of Asset (Liability)	(598)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 30,000 Notional Amount, 85 Price Floor, 98 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	30,000
Price Floor	85.00
Price Ceiling	98.00
Fair Value of Asset (Liability)	(1,122)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 12,000 Notional Amount, 85 Price Floor, 100 Price Ceiling [Member] [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	12,000
Price Floor	85
Price Ceiling	100.00
Fair Value of Asset (Liability)	(340)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 15,000 Notional Amount, 87 Price Floor, 97 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	15,000
Price Floor	87.00
Price Ceiling	97.00
Fair Value of Asset (Liability)	(630)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 20,000 Notional Amount, 88 Price Floor, 95.60 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	20,000
Price Floor	88.00
Price Ceiling	95.60
Fair Value of Asset (Liability)	(979)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 20,000 Notional Amount, 90 Price Floor, 97 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	20,000
Price Floor	90.00
Price Ceiling	97.00
Fair Value of Asset (Liability)	(825)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 12,000 Notional Amount, 90 Price Floor, 97.90 Price Ceiling [Member] [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	12,000
Price Floor	90
Price Ceiling	97.90
Fair Value of Asset (Liability)	(443)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 15,000 Notional Amount, 90 Price Floor, 97.90 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	15,000
Price Floor	90.00
Price Ceiling	97.90
Fair Value of Asset (Liability)	(553)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 15,000 Notional Amount, 90 Price Floor, 98 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	15,000
Price Floor	90.00
Price Ceiling	98.00
Fair Value of Asset (Liability)	(546)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 15,000 Notional Amount, 90 Price Floor, 101.15 Price Ceiling [Member] [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	15,000
Price Floor	90.00
Price Ceiling	101.15
Fair Value of Asset (Liability)	(337)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 10,000 Notional Amount, 90 Price Floor, 103.75 Price Ceiling [Member] [Member] [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	10,000
Price Floor	90
Price Ceiling	103.75
Fair Value of Asset (Liability)	(133)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 10,000 Notional Amount, 93 Price Floor, 103.88 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	10,000
Price Floor	90
Price Ceiling	103.88
Fair Value of Asset (Liability)	(130)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 10,000 Notional Amount, 90 Price Floor, 104.15 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	10,000
Price Floor	90
Price Ceiling	104.15
Fair Value of Asset (Liability)	(122)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 20,000 Notional Amount, 80 Price Floor, 100.00 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	20,000
Price Floor	80.00
Price Ceiling	100.00
Fair Value of Asset (Liability)	(714)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 20,000 Notional Amount, 80 Price Floor, 101.00 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	20,000
Price Floor	80.00
Price Ceiling	101.00
Fair Value of Asset (Liability)	(610)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 20,000 Notional Amount, 85 Price Floor, 99.00 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	20,000
Price Floor	85
Price Ceiling	99
Fair Value of Asset (Liability)	(624)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 20,000 Notional Amount, 85 Price Floor, 100.00 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	20,000
Price Floor	85
Price Ceiling	100.00
Fair Value of Asset (Liability)	(550)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 20,000 Notional Amount, 85 Price Floor, 105.10 Price Ceiling [Member] [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	20,000
Price Floor	85
Price Ceiling	105.10
Fair Value of Asset (Liability)	(105)
Open costless collar contracts [Member] | Natural Gas [Member]
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	(1,016)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3 Price Floor, 5.15 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.00
Price Ceiling	5.15
Fair Value of Asset (Liability)	(36)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.25 Price Floor, 5.21 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.25
Price Ceiling	5.21
Fair Value of Asset (Liability)	(32)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.25 Price Floor, 5.22 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.25
Price Ceiling	5.22
Fair Value of Asset (Liability)	(32)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.25 Price Floor, 5.37 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.25
Price Ceiling	5.37
Fair Value of Asset (Liability)	(23)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.25 Price Floor, 5.42 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.25
Price Ceiling	5.42
Fair Value of Asset (Liability)	(21)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.50 Price Floor, 4.90 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.50
Price Ceiling	4.90
Fair Value of Asset (Liability)	(49)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.75 Price Floor, 4.75 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	4.75
Fair Value of Asset (Liability)	(53)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.75 Price Floor, 4.77 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	4.77
Fair Value of Asset (Liability)	(53)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 4.00 Price Floor, 4.60 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	4.00
Price Ceiling	4.60
Fair Value of Asset (Liability)	(58)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.75 Price Floor, 4.36 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2015
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	4.36
Fair Value of Asset (Liability)	(310)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.75Price Floor, 4.45 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	07/01/2014 - 12/31/2015
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	4.45
Fair Value of Asset (Liability)	(241)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.75 Price Floor, 4.60 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 03/31/2015
Notional Quantity	200,000
Price Floor	3.75
Price Ceiling	4.60
Fair Value of Asset (Liability)	(79)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 200,000 Notional Amount, 4.00 Price Floor, 4.84 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	100,000
Price Floor	4.00
Price Ceiling	4.84
Fair Value of Asset (Liability)	(81)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.75 Price Floor, 4.65 Price Ceiling [Member] [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	4.65
Fair Value of Asset (Liability)	(70)
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 200,000 Notional Amount, 3.75 Price Floor, 5.04 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	200,000
Price Floor	3.75
Price Ceiling	5.04
Fair Value of Asset (Liability)	47
Open costless collar contracts [Member] | Natural Gas [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.75 Price Floor, 5.34 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	01/01/2015 - 12/31/2015
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	5.34
Fair Value of Asset (Liability)	$ 75