Commitments and Contingencies Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified				24 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Indirect Tax Liability [Member]	Dec. 31, 2012 Indirect Tax Liability [Member]	Dec. 31, 2009 Brazilian Federal Indirect Tax Assessment [Member]	Sep. 30, 2013 Securities Action [Member]	Sep. 30, 2013 FCPA [Member]	Dec. 31, 2012 FCPA [Member]	Sep. 30, 2013 Minimum [Member] FCPA [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months	$ 15,420
Loss Contingency, Damages Sought, Value				133,000
Loss Contingency Accrual, at Carrying Value		26,000	26,000			48,000	20,000
Loss Contingency, Range of Possible Loss, Portion Not Accrued		381,000
Loss Contingency Accrual, Provision					30,000
Loss Contingency, Loss in Period					17,245	28,000
Loss Contingency, Related Receivable Carrying Value, Additions					12,755
Loss Contingency, Settlement Agreement, Consideration						$ 48,000
Period Required for Compliance Monitor								18 months