Schedule II-Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in valuation and qualifying accounts
Balance at beginning of period	$ 3,775	$ 4,088	$ 1,975
Additions:
Bad debt expense	2,026	2,544	2,399
Deductions:
Charge-offs foreign currency translation and other adjustments	(2,978)	(2,857)	(286)
Balance at end of period	$ 2,823	$ 3,775	$ 4,088