SEC Schedule, Article 12-09, Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 3,304	$ 1,879	$ 2,453
Charged to Costs and Expenses	3,487	2,996	1,538
Removal of Uncollectible Receivables	(1,305)	(1,377)	(1,795)
Translation Adjustments Increase (Decrease)	(13)	(194)	(317)
Balance at the End of Period	5,473	3,304	1,879
Valuation allowance for deferred income taxes
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	65,649	68,479	19,032
Charged to Costs and Expenses	128,938	(2,830)	49,447
Other	2,436	0	0
Translation Adjustments Increase (Decrease)	1,429	0	0
Balance at the End of Period	$ 198,452	$ 65,649	$ 68,479