Debt (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Long-term debt
Long-term Debt	$ 368,735	$ 368,749
Unamortized debt discount	(7,206)	(7,794)
Long-term debt, net of discount	361,529	360,955
Less: current portion of long-term debt	62	60
Total long-term debt, net of current maturities	361,467	360,895
Term loan [Member]
Long-term debt
Long-term Debt	225,000	225,000
2016 notes [Member]
Long-term debt
Long-term Debt	139,718	139,718
Other long-term debt [Member]
Long-term debt
Long-term Debt	$ 4,017	$ 4,031

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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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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