Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-09, Allowance, Credit Loss
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	$ 21,696	$ 6,969	$ 4,143
Provision for doubtful accounts	1,749	12,325	3,571
Write-off of accounts receivable against allowance	(754)	(2,290)	(745)
Other (opening balance adjustments on acquisitions)	0	4,692	0
Ending Balance	22,691	21,696	6,969
SEC Schedule, 12-09, Valuation Allowance, Operating Loss Carryforward
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning Balance	3,288	2,031	35
Decrease (increase)	1,128	(1,257)	(1,996)
Ending Balance	$ 2,160	$ 3,288	$ 2,031