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Accumulated Other Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2015
Equity [Abstract]  
Schedule of accumulated other comprehensive income
Accumulated other comprehensive income, net of tax, consisted of the following (in thousands):
 
Foreign Currency Adjustments
 
Unrealized Gains (Losses) on Marketable Securities
 
Total Accumulated Other Comprehensive Income
Balances at December 31, 2014
$
10,249

 
$
527

 
$
10,776

Current period other comprehensive income (loss)
(14,261
)
 
(619
)
 
(14,880
)
Balances at March 31, 2015
$
(4,012
)
 
$
(92
)
 
$
(4,104
)