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Leases and Other Commitments (Tables)
12 Months Ended
Dec. 31, 2011
Leases And Other Commitments [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
    
(in thousands)  
2012 $ 135,911
2013   116,435
2014   99,335
2015   78,955
2016   69,597
Thereafter   243,736
  $ 743,969