6. Goodwill and Indefinite-Lived Intangible Assets (Tables)
|12 Months Ended|
Dec. 31, 2016
|Goodwill and Intangible Assets Disclosure [Abstract]|
|Reconciliation of Change in Carrying Value of Goodwill||
Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.
Reference 1: http://www.xbrl.org/2003/role/presentationRef