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Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Notes)
 3 Months Ended
Mar. 31, 2017
Accumulated Other Comprehensive Income [Abstract]  
Comprehensive Income (Loss) Note [Text Block]
Accumulated Other Comprehensive Income

The following table summarizes the changes in accumulated balances of other comprehensive income, net of tax, for the three months ended March 31, 2017 (in thousands):
 
Unrealized Gains (Losses) on Investments
 
Foreign Currency Translation
 
Total
Beginning balance
$
—

 
$
(54,649
)
 
$
(54,649
)
     Other comprehensive income before reclassifications
—

 
3,582

 
3,582

     Amounts reclassified from accumulated other comprehensive income
—

 
—

 
—

Net current period other comprehensive income
—

 
3,582

 
3,582

Ending balance
$
—

 
$
(51,067
)
 
$
(51,067
)