Intangible Assets and Goodwill - Goodwill (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Goodwill
Number of segments | segment	3
Beginning of Year Balance	$ 359,781	$ 359,771
Deletions	(825)
Currency Translation Adjustments	(633)	10
End of Year Balance	358,323	359,781
ITPS
Goodwill
Beginning of Year Balance	254,130	254,120
Deletions	(825)
Currency Translation Adjustments	(633)	10
End of Year Balance	252,672	254,130
Accumulated impairment losses	316,500	317,500	$ 317,500
HS
Goodwill
Beginning of Year Balance	86,786	86,786
End of Year Balance	86,786	86,786
LLPS
Goodwill
Beginning of Year Balance	18,865	18,865
End of Year Balance	18,865	18,865
Accumulated impairment losses	$ 243,400	$ 243,400	$ 243,400