Supplemental Disclosures (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Summary of current accrued liabilities
Total accrued liabilities	$ 122,421	$ 109,502
Accrued evaluated and unproved and unevaluated property costs
Summary of current accrued liabilities
Total accrued liabilities	77,662	86,259
Accrued support equipment and facilities costs
Summary of current accrued liabilities
Total accrued liabilities	8,149	4,290
Accrued lease operating expenses
Summary of current accrued liabilities
Total accrued liabilities	11,594	9,034
Accrued interest on borrowings under the Credit Agreement and the Notes
Summary of current accrued liabilities
Total accrued liabilities	5,882	206
Accrued asset retirement obligations
Summary of current accrued liabilities
Total accrued liabilities	275	311
Accrued partners’ share of joint interest charges
Summary of current accrued liabilities
Total accrued liabilities	8,811	3,767
Other
Summary of current accrued liabilities
Total accrued liabilities	$ 10,048	$ 5,635