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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2014
Commitments and Contingencies [Abstract]  
Future Minimum Operating Lease Commitments
The future minimum operating lease commitments for each of the next five years and thereafter and in the aggregate as of December 31, 2014 are as follows (in thousands):

 
 
December 31, 2014
 
2015
 
$
24,418
 
2016
  
18,545
 
2017
  
12,661
 
2018
  
7,845
 
2019
  
4,225
 
Thereafter
  
5,731
 
 Total
 
$
73,425