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Debt (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended				6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Second Lien Notes due 2018 [Member]	Dec. 31, 2011 Second Lien Notes due 2018 [Member]	Jun. 30, 2012 2011 Credit Agreement [Member] Senior secured credit facility due 2017 [Member]	Jun. 30, 2012 2011 Credit Agreement [Member] Senior secured incremental term loan due 2017 [Member]
Summary of outstanding debt
Beginning balance			$ 810,888		$ 325,000	$ 325,000	$ 339,232	$ 146,656
Payments			(750)					(750)
Accretion of discount	117	93	227	237			65	162
Ending balance	$ 810,365		$ 810,365		$ 325,000	$ 325,000	$ 339,297	$ 146,068
Weighted average interest rate					13.25%		4.36%	4.38%

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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