Debt Schedule of Debt (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Debt	$ 496,252	$ 610,941
Current portion of long term debt	(15,000)	(228,721)
Long-term debt	481,252	382,220
2007 Senior Secured Credit Facility [Member] \| USD Denominated Term Loan [Member]
Debt Instrument [Line Items]
Debt	0	218,642
2007 Senior Secured Credit Facility [Member] \| EUR Denominated Term Loan [Member]
Debt Instrument [Line Items]
Debt	0	174,031
2011 Senior Secured Credit Facility [Member] \| USD Denominated Term Loan [Member]
Debt Instrument [Line Items]
Debt	296,252	0
2011 Senior Secured Credit Facility [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Debt	200,000	0
Senior Subordinated Notes [Member] \| Convertible Subordinated Debt [Member]
Debt Instrument [Line Items]
Debt	$ 0	$ 218,268

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. 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, and after deducting unamortized discount or premiums, if any.

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Total of the portions of the carrying amounts as of the balance sheet date of long-term debt, which may include notes payable, bonds payable, debentures, mortgage loans, and commercial paper, which are scheduled to be repaid within one year or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year (current maturities) or the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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