Commitments and Contingencies Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified				24 Months Ended		3 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 Indirect Tax Liability [Member]	Dec. 31, 2012 Indirect Tax Liability [Member]	Dec. 31, 2009 Brazilian Federal Indirect Tax Assessment [Member]	Jun. 30, 2013 Brazilian Federal Indirect Tax Assessment [Member]	Jun. 30, 2013 Securities Action [Member]	Jun. 30, 2013 FCPA [Member]	Dec. 31, 2012 FCPA [Member]	Jun. 30, 2013 Minimum [Member] FCPA [Member]
Loss Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months	$ 16,728
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, Damages Sought, Value				133,000		30,000
Loss Contingency, Related Receivable Carrying Value, Additions						12,500
Loss Contingency, Range of Possible Loss, Minimum					0
Loss Contingency, Range of Possible Loss, Maximum					236,000
Loss Contingency, Settlement Agreement, Consideration							48,000
Period Required for Compliance Monitor									18 months
Loss Contingency, Loss in Period						$ 17,500	$ 28,000