Leases - Lease Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 10,128
Selling, general and administrative
Lessee, Lease, Description [Line Items]
Operating lease expense	9,964
Research and development
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 164