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Accumulated Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 2013
Accumulated Other Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
 
Foreign currency translation adjustment
(Amount in thousands)
 
Unrealized gain (loss) on available-for-sale securities
(Amount in thousands)
 
Accumulated Other Comprehensive Income (Loss)
(Amount in thousands)
Beginning balance at December 31, 2012
$
501

 
$
8

 
$
509

Change during January- March 2013
(446
)
 
—

 
(446
)
Balance at March 31, 2013
$
55

 
$
8

 
$
63

Current period change
$
169

 
$
—

 
$
169

Balance at June 30, 2013
$
224

 
$
8

 
$
232