Goodwill

6 Months Ended

Jun. 30, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

4. 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 June 30, 2017 and December 31, 2016, $138.4 million was recorded as goodwill on the Consolidated Balance Sheets.