Property and Equipment, net (Tables)

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment, net

The following table summarizes property and equipment, net as of September 30, 2019 and December 31, 2018 (in thousands):

	September 30, 2019			December 31, 2018
Furniture and computer equipment	$	459,896		$	339,761
Site and software development costs	263,555			172,653
Leasehold improvements	189,622			109,929
Construction in progress	36,023			90,104
Buildings (leased - Note 6)	—			184,694
	949,096			897,141
Less accumulated depreciation and amortization	(402,040		)	(290,164		)
Property and equipment, net	$	547,056		$	606,977