Goodwill

3 Months Ended

Mar. 31, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

6. Goodwill

Goodwill represents the excess of costs of an acquired business over the fair value of the assets acquired, less liabilities assumed. We conduct an impairment test of goodwill at least annually. As of March 31, 2015 and December 31, 2014, $138.4 million was recorded as goodwill in the Consolidated Balance Sheets.