CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Allocated share-based compensation expense	$ 19,471	$ 15,154	$ 36,973	$ 30,265
Amortization of acquisition intangible assets	3,358	2,169	6,726	3,194
Cost of revenue
Allocated share-based compensation expense	1,047	991	2,007	2,087
Amortization of acquisition intangible assets	2,003	1,403	4,013	1,891
Research and development
Allocated share-based compensation expense	7,496	5,629	13,953	10,395
Sales and marketing
Allocated share-based compensation expense	4,841	3,016	9,184	5,796
Amortization of acquisition intangible assets	1,355	766	2,713	1,303
General and administrative
Allocated share-based compensation expense	$ 6,087	$ 5,518	$ 11,829	$ 11,987