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Debt (Details 1) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Debt Instrument [Line Items]    
7.25% unsecured notes due February 1, 2019 $ 397,790 $ 397,479
Other indebtedness 6,710 7,196
Total Debt 451,089 696,711
Less: current portion (3,022) (243,327)
Total Long-Term Debt 448,067 453,384
USD [Member]
   
Debt Instrument [Line Items]    
Revolving credit borrowing 0 240,121
AUD [Member]
   
Debt Instrument [Line Items]    
Revolving credit borrowing $ 46,589 $ 51,915