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Accumulated Other Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2015
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, 2014
$
(424
)
 
$
(7
)
 
$
(431
)
Change during January- March 2015
(1,125
)
 
8

 
(1,117
)
Balance at March 31, 2015
(1,549
)
 
1

 
(1,548
)