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Income Taxes (Pre-Tax Income and Applicable Tax Rates) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Domestic $ 6,604 $ 12,043 $ 13,694
Pre-tax income, Foreign 71,425 61,452 45,960
Total 78,029 73,495 59,654
Statutory tax rate 35.00% 35.00% 35.00%
United States [Member]
     
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Domestic 6,604    
Statutory tax rate 35.00%    
Canada
     
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Pre-tax income, Foreign 1,289    
Statutory tax rate 30.50%    
Latin America [Member]
     
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Pre-tax income, Foreign 420    
Statutory tax rate 34.00%    
Australia
     
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Pre-tax income, Foreign 1,465    
Statutory tax rate 30.00%    
Singapore [Member]
     
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Pre-tax income, Foreign 25,188    
Statutory tax rate 10.00%    
New Zealand
     
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Pre-tax income, Foreign 292    
Statutory tax rate 28.00%    
India [Member]
     
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Pre-tax income, Foreign 35,708    
Statutory tax rate 0.00%    
Europe (United Kingdom)
     
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Pre-tax income, Foreign 67    
Statutory tax rate 24.00%    
Sweden
     
Pre-Tax Income and Applicable Tax Rates [Line Items]      
Pre-tax income, Foreign $ 6,996    
Statutory tax rate 0.00%