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Accumulated Other Comprehensive Income
12 Months Ended
Dec. 31, 2012
Accumulated Other Comprehensive Income [Abstract]  
Accumulated Other Comprehensive Income

10. Accumulated Other Comprehensive Income

 

 

 

 

 

 

 

Accumulated other comprehensive income

 

Accumulated other comprehensive income, net of tax

As of December 31, 2010

$

929 

$

790 

Decreases to fair market value of marketable securities during period

 

(295)

 

(251)

Decreases due to realization of a gain on sale of marketable securities

 

(459)

 

(390)

As of December 31, 2011

 

175 

 

149 

Increases to fair market value of marketable securities during period

 

19 

 

16 

Decreases due to realization of a gain on sale of marketable securities

 

(192)

 

(163)

As of December 31, 2012

$

$