XML 83 R41.htm IDEA: XBRL DOCUMENT

Financial Instruments - Effect of Derivative Instruments on Condensed Consolidated Statement of Operations (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/loss recognized in income	$ (421)	$ 2,471
Derivatives Designated as Cash-Flow Hedging Instruments [Member] \| Interest Rate Swap [Member] \| Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/loss recognized in income	(210)
Derivatives Not Designated as Cash-Flow Hedging Instruments [Member] \| Natural Gas Commodity Contracts [Member] \| Unrealized Gain (Loss) on Derivative Instruments, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/loss recognized in income	565	(437)
Derivatives Not Designated as Cash-Flow Hedging Instruments [Member] \| Natural Gas Commodity Contracts [Member] \| Realized Gain (Loss) on Derivative Instruments, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/loss recognized in income	(580)	331
Derivatives Not Designated as Cash-Flow Hedging Instruments [Member] \| Crude Oil Commodity Contracts [Member] \| Unrealized Gain (Loss) on Derivative Instruments, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/loss recognized in income	1,796	2,834
Derivatives Not Designated as Cash-Flow Hedging Instruments [Member] \| Crude Oil Commodity Contracts [Member] \| Realized Gain (Loss) on Derivative Instruments, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain/loss recognized in income	$ (1,992)	$ (257)