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Debt (Details 1)
In Thousands, unless otherwise specified
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2013
USD [Member]
USD ($)
Dec. 31, 2012
USD [Member]
USD ($)
Dec. 20, 2012
USD [Member]
USD ($)
Dec. 31, 2013
AUD [Member]
USD ($)
Dec. 31, 2012
AUD [Member]
USD ($)
Sep. 07, 2011
AUD [Member]
AUD
Debt Instrument [Line Items]                
7.25% unsecured notes due February 1, 2019 $ 397,893 $ 397,479            
Revolving credit borrowing     0 240,121 240,000 44,625 51,915 50,000
Other indebtedness 8,258 7,196            
Total Debt 450,776 696,711            
Less: current portion (3,168) (243,327)            
Total Long-Term Debt $ 447,608 $ 453,384            
Interest rate of debt instrument         1.5107%