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Commitments and Contingencies (Details Textual)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
USD ($)
Jun. 30, 2013
BRL
Dec. 31, 2012
USD ($)
Jun. 30, 2013
Value Added Tax [Member]
USD ($)
Jun. 30, 2013
Value Added Tax [Member]
BRL
Jun. 30, 2013
Value Added Tax, Interest [Member]
USD ($)
Jun. 30, 2013
Value Added Tax, Interest [Member]
BRL
Jun. 30, 2013
Value Added Tax, Penalties [Member]
USD ($)
Jun. 30, 2013
Value Added Tax, Penalties [Member]
BRL
Jun. 30, 2013
Letter Of Credit [Member]
USD ($)
Accrual for Environmental Loss Contingencies, Gross $ 1,340   $ 1,340              
Loss Contingency, Estimate Of Possible Loss 11,531   11,925              
Environmental Exit Costs, Anticipated Cost                   2,000
Percentage Of State Value Added Tax 25.00% 25.00%                
Loss Contingencies, Aggregate Tax Assessment 41,700 92,500   6,000 13,200 5,100 11,400 30,600 67,900  
Accounts Payable and Accrued Liabilities 733   733              
Product Warranty Accrual, Noncurrent $ 528   $ 494              
Noncontrolling Interest, Ownership Percentage By Parent 74.00% 74.00%