|3 Months Ended|
Mar. 31, 2018
|Summary of Changes to Carrying Amount of Goodwill||
The following is a summary of the changes to the carrying amount of goodwill for the three months ended March 31, 2018 and the year ended December 31, 2017:
Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.
Reference 1: http://www.xbrl.org/2003/role/presentationRef