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Debt And Liquidity (Schedule of Short-Term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Short-term Debt [Line Items]    
Total Short-Term Debt $ 191,446us-gaap_LongTermDebtCurrent $ 188,104us-gaap_LongTermDebtCurrent
Senior Subordinated Notes    
Short-term Debt [Line Items]    
Total Short-Term Debt 191,314us-gaap_LongTermDebtCurrent
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
187,973us-gaap_LongTermDebtCurrent
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
Other debt    
Short-term Debt [Line Items]    
Total Short-Term Debt $ 132us-gaap_LongTermDebtCurrent
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
$ 131us-gaap_LongTermDebtCurrent
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember