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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2013
Future Minimum Rental Commitments for Operating Leases with Non-cancelable Terms
Future minimum rental commitments for operating leases with non-cancelable terms in excess of one year are as follows:

   
Minimum rental payments
 
   
(in thousands)
 
2014
  $ 36,070  
2015
    31,815  
2016
    25,993  
2017
    17,013  
2018
    12,704  
Thereafter
    40,224  
Total
  $ 163,819