Leases - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) lease	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 122,000
Operating leases expense		$ 66,700	$ 48,400
Operating lease, lease not yet commenced, expense	342,300
Letters of credit outstanding, amount	46,700	$ 26,800
Lease financing obligation, net of current portion	$ 0			$ 0
Property Lease Guarantee
Lessee, Lease, Description [Line Items]
Warehouse lease arrangements | lease		3
Lease financing obligation, net of current portion		$ 101,000
Warehouse Lease Arrangement | Property Lease Guarantee
Lessee, Lease, Description [Line Items]
Letters of credit outstanding, amount		$ 2,500
Minimum
Lessee, Lease, Description [Line Items]
Operating leases, Lease not yet commenced, terms	5 years
Maximum
Lessee, Lease, Description [Line Items]
Operating leases, Lease not yet commenced, terms	15 years