Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Assets And Liabilities Measured At Fair Value On A Recurring Basis

The following tables present the Company’s assets and liabilities measured at fair value on a recurring basis as of December 31, 2012 and 2011, and indicate the fair value hierarchy of the valuation techniques utilized by the Company to determine such fair value:

	December 31, 2012										December 31, 2011
	Level 1		Level 2			Level 3		Total			Level 1		Level 2			Level 3		Total
	(In thousands)
Assets:
Derivative instruments	$	—	$	36,452		$	—	$	36,452		$	—	$	61,063		$	—	$	61,063
Liabilities:
Derivative instruments	—		(7,291		)	—		(7,291		)	—		(23,569		)	—		(23,569		)
Total	$	—	$	29,161		$	—	$	29,161		$	—	$	37,494		$	—	$	37,494

Schedule of Fair Value of Debt Instruments

The following table presents the carrying amounts and fair values of the Company’s senior notes and convertible senior notes, based on quoted market prices, as of December 31, 2012 and 2011.

	December 31, 2012				December 31, 2011
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In thousands)
8.625% Senior Notes	$	595,151	$	645,000	$	594,535	$	606,000
7.50% Senior Notes	300,000		308,250		—		—
4.375% Convertible Senior Notes	72,657		73,842		69,951		73,013