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Accumulated Other Comprehensive Income (Tables)
 9 Months Ended
Sep. 30, 2015
Accumulated Other Comprehensive Income [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The following table summarizes the changes in accumulated balances of other comprehensive income, net of tax, for the three months ended September 30, 2015 (in thousands):
 
Unrealized Gains (Losses) on Investments
 
Foreign Currency Translation
 
Total
Beginning balance
$
5,834

 
$
(24,640
)
 
$
(18,806
)
     Other comprehensive (loss) income before reclassifications
(1,059
)
 
(4,652
)
 
(5,711
)
     Amounts reclassified from accumulated other comprehensive income
2

 
—

 
2

Net current period other comprehensive (loss) income
(1,057
)
 
(4,652
)
 
(5,709
)
Ending balance
$
4,777

 
$
(29,292
)
 
$
(24,515
)


The following table summarizes the changes in accumulated balances of other comprehensive income, net of tax, for the nine months ended September 30, 2015 (in thousands):
 
Unrealized Gains (Losses) on Investments
 
Foreign Currency Translation
 
Total
Beginning balance
$
9,388

 
$
(16,515
)
 
$
(7,127
)
     Other comprehensive (loss) income before reclassifications
(4,600
)
 
(12,777
)
 
(17,377
)
     Amounts reclassified from accumulated other comprehensive income
(11
)
 
—

 
(11
)
Net current period other comprehensive (loss) income
(4,611
)
 
(12,777
)
 
(17,388
)
Ending balance
$
4,777

 
$
(29,292
)
 
$
(24,515
)
Reclassification Out Of Accumulated Other Comprehensive Income [Table Text Block]
The following table provides details about reclassifications out of accumulated other comprehensive income for the three and nine months ended September 30, 2015 (in thousands):
Details about Accumulated Other Comprehensive Income Components
 
Amount Reclassified from Accumulated Other Comprehensive Income
 
Affected Line Item in the Statement of Income
 
 
Three Months Ended September 30, 2015
 
Nine Months Ended September 30, 2015
 
 
Unrealized gain on available-for-sale investments
 
$
3

 
$
(18
)
 
Other expense (income), net
 
 
3

 
(18
)
 
Total, before income taxes
 
 
(1
)
 
7

 
Income tax expense (benefit)
 
 
2

 
(11
)
 
Total, net of tax
Total reclassifications for the period
 
$
2

 
$
(11
)
 
Total, net of tax