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Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2018
Accumulated Other Comprehensive Income  
Summary of changes in accumulated other comprehensive income

 

 

 

 

 

 

 

 

 

 

 

 

    

Unrealized 

    

 

 

    

 

 

 

 

Gain (Loss) on

 

 

 

 

 

 

 

 

Marketable

 

Foreign

 

 

 

 

 

Securities

 

Currency Items

 

Total

 

 

(In thousands)

Balance at December 31, 2017

 

$

(32)

 

$

2,596

 

$

2,564

Other comprehensive gain

 

 

19

 

 

 —

 

 

19

Balance at December 31, 2018

 

$

(13)

 

$

2,596

 

$

2,583