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Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 147,034		$ 146,856
Accumulated Amortization	(70,103)		(67,735)
Net Amount	76,931		79,121
Amortization expense	2,369	$ 2,295
Customer Lists/Relationships
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	97,393		97,355
Accumulated Amortization	(45,447)		(44,002)
Net Amount	51,946		53,353
Technology and Other Intangibles
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	47,441		47,301
Accumulated Amortization	(22,456)		(21,533)
Net Amount	24,985		25,768
In Process Research and Development
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,200		2,200
Accumulated Amortization	$ (2,200)		$ (2,200)

X

- Definition

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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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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