Debt (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Debt, Long-term and Short-term, Combined Amount, Total	$ 1,323,353	$ 1,364,300
Less: Short-term borrowings and current portion of long-term debt	(99,275)	(150,081)
Long-term debt (including related party)	1,224,078	1,214,219
Senior Notes Due June 2016 [Member]
Debt Instrument [Line Items]
Senior notes	0	264,283
Senior Notes Due May 2018 [Member]
Debt Instrument [Line Items]
Senior notes	345,000	345,000
Senior Notes Due 2021 [Member]
Debt Instrument [Line Items]
Senior notes	400,000
Convertible Senior Subordinated Notes Due May 2011 [Member]
Debt Instrument [Line Items]
Convertible subordinated notes	0	42,579
Convertible Senior Subordinated Notes Due April 2014 [Member]
Debt Instrument [Line Items]
Convertible subordinated notes	250,000	250,000
Convertible Subordinated Notes Due December 2013 [Member] \| Related Party [Member]
Debt Instrument [Line Items]
Convertible subordinated notes	0	100,000
Term Loan Due April 2014 [Member] \| Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	128,568	149,996
Term Loan Due May 2013 [Member] \| Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	113,000	123,000
Term Loan 90 Day Commercial Paper Due April 2015 [Member] \| Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	51,854	51,042
Term Loan TIBOR Due September 2012 [Member] \| Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	14,546	19,848
Term Loan TIBOR Due July 2011 [Member] \| Subsidiaries [Member]
Debt Instrument [Line Items]
Term Loan for subsidiaries	385	2,680
Secured equipment and property financing [Member] \| Subsidiaries [Member]
Debt Instrument [Line Items]
Secured equipment and property financing	0	872
Subsidiaries [Member] \| Working Capital Facility Due January 2011 [Member]
Line of Credit Facility [Line Items]
Borrowing under senior secured credit facility	0	15,000
Subsidiaries [Member] \| Working capital facility Due January 2012 and April 2012 [Member]
Line of Credit Facility [Line Items]
Borrowing under senior secured credit facility	20,000	0
Subsidiaries [Member] \| Revolving credit facilities [Member]
Line of Credit Facility [Line Items]
Borrowing under senior secured credit facility	0	0
$100 million revolving credit facility, LIBOR plus 2.25%-2.75%, due April 2015 [Member]
Line of Credit Facility [Line Items]
Borrowing under senior secured credit facility	$ 0	$ 0

Non current long-term debt including related party.

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Including the current and noncurrent portions, the carrying value of convertible subordinated debt, as of the balance sheet date, initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. This form of debt can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder, and places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Carrying value as of the balance sheet date of the sum of short-term debt and current maturities of long-term debt and capital lease obligations, which are due within one year (or one business cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
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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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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

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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 the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ References

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Carrying value as of the balance sheet date , including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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