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Long-Term Debt (Tables)
6 Months Ended
Jun. 30, 2012
Long-Term Debt  
Components Of Long-Term Debt
   June 30, December 31,
   2012 2011
        
Revolving credit agreement  $ 316,000 $ 351,000
Fixed rate senior secured notes    75,000   75,000
Other debt    17,567   20,052
Capitalized lease arrangements    11,177   12,711
        
     419,744   458,763
Less current portion    10,018   10,800
        
 Long-term debt  $ 409,726 $ 447,963