Investments

12 Months Ended

Dec. 31, 2013

Investments [Abstract]

Investments

5.  Investments

     In the fourth quarter of 2013, the company sold all of its investments in auction-rate securities and preferred stock that were recorded at a fair value of $9.2 million as of December 31, 2012.  Accordingly, there were no such investments at December 31, 2013.  The company received $12.8 million in proceeds from the sale, resulting in a $3.7 million gain in 2013 recorded in interest income and other, net.  The sold investments were not significant to the accompanying consolidated financial statements taken as a whole; accordingly, additional related disclosures are omitted from these notes to the consolidated financial statements.