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Noncontrolling Interest (Tables)
 9 Months Ended
Sep. 30, 2013
Noncontrolling Interest [Abstract]  
Schedule of changes in noncontrolling interest
The following table sets forth the changes in noncontrolling interest (in thousands):
 
 
Three Months Ended  
 September 30,
 
Nine Months Ended 
 September 30,
 
 
2013
 
2012
 
2013
 
2012
Balance at beginning of period
 
$
(21
)
 
$
227

 
$
103

 
$
360

Net loss attributable to noncontrolling interest
 
—

 
(81
)
 
(125
)
 
(216
)
Foreign currency translation attributable to noncontrolling interest
 
—

 
—

 
1

 
2

Purchase of noncontrolling interest in consolidated subsidiary
 
21

 
—

 
21

 
—

Balance at end of period
 
$
—

 
$
146

 
$
—

 
$
146