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Accumulated Other Comprehensive Loss (Tables)
 9 Months Ended
Sep. 30, 2013
Accumulated Other Comprehensive Loss [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The components of accumulated other comprehensive loss, net of tax, are as follows:
 
 
Foreign currency translation adjustments
 
Net unrealized losses on available-for-sale investments
 
Accumulated other comprehensive loss
Beginning Balance, December 31, 2012
 
$
985

 
$
100

 
$
1,085

    Net current period other comprehensive loss
 
385

 
39

 
424

    Reclassifications
 
—

 
—

 
—

Ending balance, September 30, 2013
 
$
1,370

 
$
139

 
$
1,509