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Debt (Details 1) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
7.25% unsecured notes due February 1, 2019 $ 397,997 $ 397,893
Other indebtedness 8,321 8,258
Total Debt 452,549 450,776
Less: current portion (49,389) (3,168)
Total Long-Term Debt 403,160 447,608
AUD [Member]
   
Debt Instrument [Line Items]    
Revolving credit borrowing $ 46,231 $ 44,625