Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	$ (5,861)
Open costless collar contracts [Member] | Oil [Member]
Summary of contracts for oil and natural gas
Notional Quantity	10,000
Fair Value of Asset (Liability)	(4,249)
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 8,000 Notional Amount, 90 Price Floor, 114 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	04/01/2014 - 06/30/2014
Notional Quantity	8,000
Price Floor	90
Price Ceiling	114
Fair Value of Asset (Liability)	4
Open costless collar contracts [Member] | Oil [Member] | Open Oil Collar Contract, 12,000 Notional Amount, 90 Price Floor, 115.50 Price Ceiling [Member]
Summary of contracts for oil and natural gas
Calculation Period	04/01/2014 - 06/30/2014
Notional Quantity	12,000
Price Floor	90.00
Price Ceiling	116
Fair Value of Asset (Liability)	6
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	04/01/2014 - 12/31/2014
Price Floor	85.00
Price Ceiling	101
Fair Value of Asset (Liability)	(141)
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	04/01/2014 - 12/31/2014
Notional Quantity	12,200
Price Floor	85.00
Price Ceiling	100
Fair Value of Asset (Liability)	(180)
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	04/01/2014 - 12/31/2014
Notional Quantity	15,000
Price Floor	85.00
Price Ceiling	97.50
Fair Value of Asset (Liability)	(423)
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	04/01/2014 - 12/31/2014
Notional Quantity	30,000
Price Floor	85.00
Price Ceiling	98.00
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	04/01/2014 - 12/31/2014
Notional Quantity	12,000
Price Floor	85
Price Ceiling	100
Fair Value of Asset (Liability)	(786)
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	04/01/2014 - 12/31/2014
Notional Quantity	15,000
Price Floor	87.00
Price Ceiling	97.00
Fair Value of Asset (Liability)	(429)
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	04/01/2014 - 12/31/2014
Notional Quantity	20,000
Price Floor	88.00
Price Ceiling	95.60
Fair Value of Asset (Liability)	(711)
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	04/01/2014 - 12/31/2014
Notional Quantity	20,000
Price Floor	90.00
Price Ceiling	97.00
Fair Value of Asset (Liability)	(495)
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	04/01/2014 - 12/31/2014
Notional Quantity	12,000
Price Floor	90
Price Ceiling	97.90
Fair Value of Asset (Liability)	(233)
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	04/01/2014 - 12/31/2014
Notional Quantity	15,000
Price Floor	90.00
Price Ceiling	97.90
Fair Value of Asset (Liability)	(295)
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
Notional Quantity	15,000
Price Floor	90.00
Price Ceiling	98.00
Fair Value of Asset (Liability)	(293)
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	04/01/2014 - 12/31/2014
Notional Quantity	15,000
Price Floor	90
Price Ceiling	101
Fair Value of Asset (Liability)	(77)
Open costless collar contracts [Member] | Open Oil Collar Contract, 12,200 Notional Amount, 85 Price Floor, 100.40 Price Ceiling [Member] [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
Fair Value of Asset (Liability)	(196)
Open costless collar contracts [Member] | Natural Gas [Member]
Summary of contracts for oil and natural gas
Fair Value of Asset (Liability)	(1,715)
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	04/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.00
Price Ceiling	5.15
Fair Value of Asset (Liability)	(87)
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	04/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.25
Price Ceiling	5.21
Fair Value of Asset (Liability)	(74)
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	04/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.25
Price Ceiling	5.22
Fair Value of Asset (Liability)	(74)
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	04/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.25
Price Ceiling	5.37
Fair Value of Asset (Liability)	(58)
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	04/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.25
Price Ceiling	5.42
Fair Value of Asset (Liability)	(54)
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	04/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.50
Price Ceiling	4.90
Fair Value of Asset (Liability)	(103)
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	04/01/2014 - 12/31/2014
Notional Quantity	100,000
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	04/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	4.77
Fair Value of Asset (Liability)	(103)
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	04/01/2014 - 12/31/2014
Notional Quantity	100,000
Price Floor	4.00
Price Ceiling	4.60
Fair Value of Asset (Liability)	(100)
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	04/01/2014 - 12/31/2015
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	4.36
Fair Value of Asset (Liability)	(420)
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	04/01/2014 - 12/31/2015
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	4.45
Fair Value of Asset (Liability)	(334)
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 - 12/31/2015
Notional Quantity	100,000
Price Floor	3.75
Price Ceiling	4.60
Fair Value of Asset (Liability)	(78)
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 - 03/31/2015
Notional Quantity	200,000
Price Floor	4.00
Price Ceiling	4.84
Fair Value of Asset (Liability)	(122)
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)	(65)
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)	67
Open costless collar contracts [Member] | Open Natural Gas Collar Contract, 100,000 Notional Amount, 3.75 Price Floor, 4.75 Price Ceiling [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
Price Floor	3.75
Price Ceiling	4.75
Fair Value of Asset (Liability)	$ (110)