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Supplemental Information Other Income, Net (Tables)
 6 Months Ended
Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Other Income, Net
Other Income, Net
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
 
2015
 
2014
 
2015
 
2014
Interest income
 
$
866

 
$
1,105

 
$
1,751

 
$
2,328

Dividend income
 
1,357

 
—

 
3,329

 
—

Foreign exchange currency (losses) gains, net
 
(500
)
 
3

 
1,871

 
(245
)
(Loss) income from equity method investments
 
(350
)
 
1,920

 
4,613

 
3,941

Impairment of equity method investment
 
(4,925
)
 
—

 
(4,925
)
 
—

Gain on acquisition and related expenses, net
 
20,430

 
—

 
20,430

 
—

Gain from sales of equity securities
 
3,795

 
—

 
3,795

 
—

Other
 
1,385

 
1,573

 
290

 
1,086

Other income, net
 
$
22,058

 
$
4,601

 
$
31,154

 
$
7,110