Commitments and Contingencies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) Customer	Dec. 31, 2017 USD ($) Customer	Dec. 31, 2016 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Lease expense	$ 7.4	$ 5.5	$ 4.2
Purchase commitments	99.0
Purchase commitments, 2019	93.9
Purchase commitments, 2020	$ 5.1
Number of customers accounted for 10% or more of accounts receivable | Customer	0	0
Minimum
Commitments and Contingencies Disclosure [Line Items]
Lease agreement expiration year	2019
Maximum
Commitments and Contingencies Disclosure [Line Items]
Lease agreement expiration year	2031
Land | Maximum
Commitments and Contingencies Disclosure [Line Items]
Lease agreement expiration year	2078