Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Offsetting Assets

	December 31, 2012
Description	Gross Amounts Recognized			Gross Amounts Offset in the Consolidated Balance Sheets			Net Amounts Presented in the Consolidated Balance Sheets
	(In thousands)
Assets:
Derivative instruments	$	36,452		$	(7,291	)	$	29,161
Liabilities:
Derivative instruments	(7,291		)	7,291			—
Total	$	29,161		$	—		$	29,161

The following tables present the Company’s assets and liabilities measured at fair value on a recurring basis as of March 31, 2013 and December 31, 2012. All items included in the tables below are Level 2 inputs within the fair value hierarchy:

	March 31, 2013
Description	Gross Amounts Recognized			Gross Amounts Offset in the Consolidated Balance Sheets			Net Amounts Presented in the Consolidated Balance Sheets
	(In thousands)
Assets:
Derivative instruments	$	20,577		$	(7,801	)	$	12,776
Liabilities:
Derivative instruments	(11,686		)	7,801			(3,885		)
Total	$	8,891		$	—		$	8,891

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 March 31, 2013 and December 31, 2012.

	March 31, 2013				December 31, 2012
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In thousands)
8.625% Senior Notes	$	595,313	$	653,356	$	595,151	$	645,000
7.50% Senior Notes	300,000		319,500		300,000		308,250
4.375% Convertible Senior Notes	73,350		73,534		72,657		73,842