Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance at the beginning of period	$ 55,006	$ 41,004	$ 40,857
Charged to tax expense/(benefit)	7,270	13,924	50
Purchase accounting adjustments	0	0	65
Impact of foreign currency exchange rate	(43)	78	32
Balance at the end of period	$ 62,233	$ 55,006	$ 41,004