Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	$ 5,207	$ 192
Assets (Liabilities)
Oil, natural gas and NGL derivatives	9	2,945
Derivative Assets (Liabilities), at Fair Value, Net	5,198
Fair value on a recurring basis [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	5,207	192
Assets (Liabilities)
Oil, natural gas and NGL derivatives	(9)
Derivative Assets (Liabilities), at Fair Value, Net		(2,945)
Total	5,198	(2,753)
Fair value on a recurring basis [Member] | Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0	0
Assets (Liabilities)
Oil, natural gas and NGL derivatives	0	0
Total
Fair value on a recurring basis [Member] | Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	5,207	192
Assets (Liabilities)
Oil, natural gas and NGL derivatives	(9)
Derivative Assets (Liabilities), at Fair Value, Net		(2,945)
Total	5,198	(2,753)
Fair value on a recurring basis [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0	0
Assets (Liabilities)
Oil, natural gas and NGL derivatives	0
Derivative Assets (Liabilities), at Fair Value, Net		0
Total