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Accumulated Other Comprehensive Loss (Tables)
 3 Months Ended
Mar. 31, 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 gains (losses) on available-for-sale investments
 
Accumulated other comprehensive loss
Beginning Balance, December 31, 2012
 
$
(985
)
 
$
(100
)
 
$
(1,085
)
Net current period other comprehensive gain (loss)
 
(449
)
 
14

 
(435
)
Reclassifications
 
—

 
—

 
—

Ending balance, March 31, 2013
 
$
(1,434
)
 
$
(86
)
 
$
(1,520
)