Derivative Contracts (Details) (Not Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Note Receivable and Purchase Option | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	$ 0		$ 6,151
Common stock options/warrants | Investments, net
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	5,703		5,988
Embedded conversion option | 2033 Senior Notes, net of discount and estimated fair value of embedded derivatives
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	50,443		101,087
Forward Contracts
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	2,914		1,585
Forward Contracts | Current portion of lines of credit and notes payable
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	$ 2,914	[1]	$ 1,585	[1]

[1] Gains on forward contracts are recorded in Prepaid expenses and other current assets. Losses on forward contracts are recorded in Accrued expenses.