Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Identified Intangible Assets - Additional Information (Details)

v3.8.0.1
Goodwill and Identified Intangible Assets - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Acquired Indefinite-lived Intangible Assets [Line Items]    
Amortization of intangible assets $ 13.8 $ 6.1