Leases - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($)
Operating Leased Assets [Line Items]
Option to extend lease term	5 years
Option to terminate lease term	1 year
Operating lease expense	$ 16.6
Minimum
Operating Leased Assets [Line Items]
Remaining lease terms	1 year
Maximum
Operating Leased Assets [Line Items]
Remaining lease terms	10 years