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General (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2012
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Dec. 31, 2011
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|---|---|---|
| Carrying amounts and classification of assets and liabilities | ||
| Current assets | $ 915,651 | $ 887,351 |
| Noncurrent assets | 396,861 | 394,537 |
| Total assets | 1,312,512 | 1,281,888 |
| Current liabilities | 337,083 | 308,466 |
| Noncurrent liabilities | 78,307 | 80,895 |
| Total liabilities | 415,390 | 389,361 |
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Variable Interest Entity, Primary Beneficiary [Member]
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| Carrying amounts and classification of assets and liabilities | ||
| Current assets | 14,067 | 11,287 |
| Noncurrent assets | 133,057 | 132,925 |
| Total assets | 147,124 | 144,212 |
| Current liabilities | 68,228 | 65,608 |
| Noncurrent liabilities | 18,276 | 18,297 |
| Total liabilities | $ 86,504 | $ 83,905 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Total obligations incurred as part of normal operations that is expected to be repaid beyond the following twelve months or one business cycle. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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