Annual report pursuant to Section 13 and 15(d)

Supplemental Oil and Gas Disclosures - Standardized Measure of Discounted Future Net Cash Flows (Parenthetical) (Details)

v3.3.1.900
Supplemental Oil and Gas Disclosures - Standardized Measure of Discounted Future Net Cash Flows (Parenthetical) (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Extractive Industries [Abstract]      
Income taxes $ 0 $ (948,400,000) [1] $ (986,900,000) [1]
[1] No future income taxes were estimated to be paid in 2015 as our present tax position has sufficient tax basis and net operating loss carrying forwards to offset any future taxes. State income taxes were disregarded due to immateriality.