XML 57 R72.htm IDEA: XBRL DOCUMENT

Supplementary Quarterly Financial Data (Unaudited) - Summary of Results of Continuing Operations from Non-Routine Items (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended							12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Data [Abstract]
Gain (loss) on sale of oil and gas properties				$ 51	$ (2,165)	$ 81			$ (2,033)
Gain on sales of marketable securities							7,877us-gaap_MarketableSecuritiesGainLoss		7,877us-gaap_MarketableSecuritiesGainLoss	26,621us-gaap_MarketableSecuritiesGainLoss
Loss on early extinguishment of debt				(17,854)					(17,854)
Impairments of unproved oil and gas properties	(487)			(18,081)	(2,995)	(9,465)	(2,443)	(487)	(32,984)	(61,300)
Impairments of proved oil and gas properties	$ (59,997)us-gaap_ImpairmentOfOilAndGasProperties	$ (15)us-gaap_ImpairmentOfOilAndGasProperties	$ (256)us-gaap_ImpairmentOfOilAndGasProperties			$ (652)us-gaap_ImpairmentOfOilAndGasProperties		$ (60,268)us-gaap_ImpairmentOfOilAndGasProperties	$ (652)us-gaap_ImpairmentOfOilAndGasProperties	$ (25,368)us-gaap_ImpairmentOfOilAndGasProperties

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

+ References+ Details