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Accumulated Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 2013
AccumulatedOtherComprehensiveIncomeTextBlockAbstract  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Changes in the components of "Accumulated other comprehensive income" were as follows:
 
 
Unrealized
Gain on
Securities
 
Cumulative
Translation
Adjustment
 
Total
 
(in thousands)
Balance at January 1, 2013
$
927

 
$
19

 
$
946

 
 
 
 
 
 
Other comprehensive income (loss) before reclassifications, net of taxes
3,543

 
(36
)
 
3,507

Amounts reclassified to realized loss
(29
)
 
—

 
(29
)
 
 
 
 
 
 
Net current period other comprehensive income
3,514

 
(36
)
 
3,478

 
 
 
 
 
 
Balance at June 30, 2013
$
4,441

 
$
(17
)
 
$
4,424