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Contingencies and Commitments (Tables)
 12 Months Ended
Dec. 31, 2013
Contingencies and Commitments [Abstract]  
Summary of future minimum lease payments
Future minimum lease payments under leases expiring subsequent to December 31, 2013 are as follows:
 
 
 
 
As of December 31, 2013
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2019-
 
2024 and
 
 
 
 
2014
 
 
2015
 
 
2016
 
 
2017
 
 
2018
 
 
2023
 
beyond
 
Minimum operating lease payments
 
$
2,473
 
$
2,413
 
$
2,219
 
$
2,195
 
$
2,242
 
$
6,575
 
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