The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Goodwill and Intangible Assets - Carrying Amounts of Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	$ 1,168,010
Foreign currency translation impact	(7,715)
Gross cost, ending balance	1,160,295
Accumulated amortization	(475,766)		$ (453,592)
Finite-lived intangible assets, net	684,529		714,418
Amortization of intangibles	25,148	$ 30,514
Customer Relationships
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	1,096,358
Foreign currency translation impact	(7,603)
Gross cost, ending balance	1,088,755
Accumulated amortization	(432,550)		(413,266)
Finite-lived intangible assets, net	$ 656,205		683,092
Customer Relationships \| Minimum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life	6 years
Customer Relationships \| Maximum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life	13 years
Technology-related
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	$ 61,216
Foreign currency translation impact	(112)
Gross cost, ending balance	61,104
Accumulated amortization	(38,366)		(35,727)
Finite-lived intangible assets, net	22,738		25,489
Other
Finite-lived Intangible Assets [Roll Forward]
Gross cost, beginning balance	10,436
Foreign currency translation impact	0
Gross cost, ending balance	10,436
Accumulated amortization	(4,850)		(4,599)
Finite-lived intangible assets, net	$ 5,586		$ 5,837
Other \| Minimum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life	4 years
Other \| Maximum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life	11 years
Technology-Based Intangible Assets \| Minimum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life	3 years
Technology-Based Intangible Assets \| Maximum
Finite-lived Intangible Assets [Roll Forward]
Finite-lived intangible assets useful life	7 years