Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Operating lease costs	$ 13,067	$ 50,764
Variable lease costs	4,182	14,451
Total lease costs	17,249	65,215
Property, plant and equipment, net
Lessee, Lease, Description [Line Items]
Operating lease costs	10,900	43,600
Total lease costs	$ 12,000	$ 51,400