8.     GOODWILL

Goodwill represents the excess of the purchase price over the fair value of net assets of businesses acquired. The carrying amount of goodwill was $212.5 million as of December 31, 2012 and $211.0 million as of December 31, 2011. Goodwill increased for the year ended December 31, 2012 due primarily to acquisitions. The carrying amount of goodwill in foreign countries was $9.8 million as of December 31, 2012 $9.6 million as of December 31, 2011. The changes in the carrying amount of goodwill for the twelve months ended December 30, 2012 and 2011 are as follows: