. the investments held by the company are high investment grade and there were no adverse credit events . because the company has the ability and intent to hold these investments until a recovery of fair value , which may be maturity , the company does not consider these investments to be other-than-temporarily impaired as of december 31 , 2006 and 2005 . gross realized gains and losses for 2006 were $ 4000 and $ 88000 respectively