Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ (6,969)	$ (4,143)	$ (2,833)
Provision for doubtful accounts	12,325	3,571	1,713
Write-off of accounts receivable against allowance/Other	(2,290)	(745)	(403)
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account	4,692	0	0
Ending balance	(21,696)	(6,969)	(4,143)
SEC Schedule, 12-09, Valuation Allowance, Operating Loss Carryforward [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	(2,031)	(35)	(3,747)
Decrease (increase)	(1,257)	(1,996)	3,712
Ending balance	$ (3,288)	$ (2,031)	$ (35)