Debt (Tables)

12 Months Ended

Dec. 31, 2012

Debt Instruments [Abstract]

Schedule of Long-term Debt Instruments

Long-term Debt

The carrying amounts of our long-term debt are as follows:

	December 31, 2012			December 31, 2011
	(In thousands)
Credit Agreement	$	421,000		$	200,000
6.5% Senior Notes
Principal	300,000			—
Unamortized discount	(4,725		)	—
	295,275			—
6.25% Senior Notes
Principal	—			185,000
Unamortized net discount	—			(105		)
	—			184,895
8.25% Senior Notes
Principal	150,000			150,000
Unamortized discount	(1,601		)	(1,907		)
	148,399			148,093
Promissory Notes	—			72,900
Total long-term debt	$	864,674		$	605,888

Schedule of Derivative Instruments

Additional information on our interest rate swaps is as follows:

Derivative Instrument	Balance Sheet Location	Fair Value		Location of Offsetting Balance	Offsetting Amount
	(In thousands)
December 31, 2012
Interest rate swap designated as cash flow hedging instrument:
Variable-to-fixed interest rate swap contract ($305.0 million of LIBOR based debt interest)	Other long-term     liabilities	$	3,430	Accumulated other     comprehensive loss	$	3,430
December 31, 2011
Interest rate swap designated as cash flow hedging instrument:
Variable-to-fixed interest rate swap contract ($155.0 million of LIBOR based debt interest)	Other long-term     liabilities	$	520	Accumulated other     comprehensive loss	$	520

Schedule of Interest Expense and Other Debt Information

Interest expense consists of the following components:

	Years Ended December 31,
	2012		2011		2010
	(In thousands)
Interest on outstanding debt:
Credit Agreement, net of interest on interest rate swaps	$	8,736	$	10,477	$	9,109
6.5% Senior Notes	15,716		—		—
6.25% Senior Notes	2,422		11,565		11,404
8.25% Senior Notes	12,380		12,380		10,298
Promissory Notes	543		745		—
Partial settlement of interest rate swap - cash flow hedge	—		—		1,076
Net fair value adjustments to interest rate swaps (1)	—		—		1,464
Amortization of unrealized loss attributable to discounted cash flow hedge	5,095		41		—
Amortization of discount and deferred debt issuance costs	1,946		1,212		713
Commitment fees	621		430		392
Total interest incurred	47,459		36,850		34,456
Less capitalized interest	277		891		462
Net interest expense	$	47,182	$	35,959	$	33,994
Cash paid for interest (2)	$	38,476	$	34,825	$	31,305

(1) Includes fair value adjustments to previous interest rate swap contracts settled during the first quarter of 2010.

(2) Presented net of cash received under previous interest rate swap contract of $1.9 million for the year ended December 31, 2010

Schedule of Maturities of Long-term Debt [Table Text Block]

Maturities of our long-term debt are as follows:

Years Ending December 31,	(In thousands)
2013	$	—
2014	—
2015	—
2016	—
2017	421,000
Thereafter	450,000
Total	$	871,000