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Derivative Contracts (Details) (Not Designated as Hedging Instrument [Member], USD $)
In Thousands, unless otherwise specified |
Jun. 30, 2014
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Dec. 31, 2013
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Note Receivable and Purchase Option [Member] | Prepaid Expenses and Other Current Assets [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value | $ 0 | $ 6,151 | ||||
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Common stock options/warrants [Member] | Investments, net [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative asset, fair value | 5,980 | 5,988 | ||||
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Embedded conversion option | 2033 Senior Notes, net of discount and estimated fair value of embedded derivatives [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative liability, fair value | 52,964 | 101,087 | ||||
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Forward contracts [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative liability, fair value | 3,624 | 1,585 | ||||
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Forward contracts [Member] | Current portion of lines of credit and notes payable [Member]
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| Derivatives, Fair Value [Line Items] | ||||||
| Derivative liability, fair value | $ 3,624 | [1] | $ 1,585 | [1] | ||
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