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Long-Term Debt (Components Of Long-Term Debt) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Long-Term Debt    
Revolving credit agreement $ 351,000 $ 188,000
Fixed rate senior secured notes 75,000 75,000
Other debt 20,052 12,933
Capitalized lease arrangements 12,711 13,930
Long-term debt, gross $ 458,763 $ 289,863