Goodwill and Intangible Assets - Carrying Amounts of Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	$ 1,279,386	$ 1,301,120
Additions due to an acquisition	19,500
Intangible assets fully amortized	(126,570)	(33,262)
Foreign currency translation impact	(4,306)	11,528
Gross cost, ending balance	1,168,010	1,279,386
Accumulated amortization	(453,592)	(472,388)
Finite-lived intangible assets, net	714,418	806,998
Customer Relationships
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	1,154,210	1,145,109
Additions due to an acquisition	7,980
Intangible assets fully amortized	(61,422)	(2,394)
Foreign currency translation impact	(4,410)	11,495
Gross cost, ending balance	1,096,358	1,154,210
Accumulated amortization	(413,266)	(381,776)
Finite-lived intangible assets, net	$ 683,092	772,434
Customer Relationships | Minimum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	6 years
Customer Relationships | Maximum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	13 years
Technology-related
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	$ 110,597	111,033
Additions due to an acquisition	11,200
Intangible assets fully amortized	(60,685)	(787)
Foreign currency translation impact	104	351
Gross cost, ending balance	61,216	110,597
Accumulated amortization	(35,727)	(83,320)
Finite-lived intangible assets, net	$ 25,489	27,277
Technology-related | Minimum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	3 years
Technology-related | Maximum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	7 years
Content
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	$ 3,965	14,140
Additions due to an acquisition	0
Intangible assets fully amortized	(3,965)	(9,929)
Foreign currency translation impact	0	(246)
Gross cost, ending balance	0	3,965
Accumulated amortization	0	(3,595)
Finite-lived intangible assets, net	$ 0	370
Content | Minimum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	2 years
Content | Maximum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	3 years
Other
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	$ 10,614	30,838
Additions due to an acquisition	320
Intangible assets fully amortized	(498)	(20,152)
Foreign currency translation impact	0	(72)
Gross cost, ending balance	10,436	10,614
Accumulated amortization	(4,599)	(3,697)
Finite-lived intangible assets, net	$ 5,837	$ 6,917
Other | Minimum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	2 years
Other | Maximum
Finite-lived Intangible Assets [Roll Forward]
Remaining amortization period	11 years