XML 54 R53.htm IDEA: XBRL DOCUMENT

Derivative Instruments and Hedging Activities (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Effect of derivative instruments on the Consolidated Balance Sheet
Fair Value Asset	$ 137,603us-gaap_DerivativeAssets	$ 3,019us-gaap_DerivativeAssets
Fair Value Liability	0cog_DerivativeLiabilities1	13,912cog_DerivativeLiabilities1
Derivatives Designated as Hedges \| Commodity contracts \| Derivative instruments (current assets)
Effect of derivative instruments on the Consolidated Balance Sheet
Fair Value Asset	0	3,019
Derivatives Designated as Hedges \| Commodity contracts \| Derivative instruments (current liabilities)
Effect of derivative instruments on the Consolidated Balance Sheet
Fair Value Liability	0	13,912
Derivatives Not Designated as Hedges \| Commodity contracts \| Derivative instruments (current assets)
Effect of derivative instruments on the Consolidated Balance Sheet
Fair Value Asset	$ 137,603	$ 0

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References+ Details