Business Combinations Brainjocks (Details) - USD ($) $ in Thousands	Mar. 23, 2020	Jun. 30, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill		$ 417,403	$ 335,564
Brainjocks [Member]
Business Acquisition [Line Items]
Total purchase price	$ 21,200
Cash paid for acquisition	15,800
Common stock issued	2,400
Net working capital settlement	700
Initial fair value estimate of additional earnings-based contingent consideration	2,300
Contingent consideration, maximum cash payout	4,800
Transaction costs	1,100
Acquired tangible assets	7,000
Acquired intangible assets	8,500
Liabilities assumed	(5,000)
Tax deductible amount of Goodwill	8,600
Goodwill	$ 10,700