Other Intangible Assets, Finite Life Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite Life Intangible Assets [Abstract]
Gross carrying amount	$ 162,100	$ 178,849
Accumulated amortization	$ 100,930	126,890
Weighted-average amortization period	14 years
Amortization expense	$ 9,800	13,400	$ 18,300
Scanner Technology [Member]
Finite Life Intangible Assets [Abstract]
Gross carrying amount	40,716	46,482
Accumulated amortization	$ 40,716	45,724
Weighted-average amortization period	18 years
Developed Technology [Member]
Finite Life Intangible Assets [Abstract]
Gross carrying amount	$ 32,546	22,500
Accumulated amortization	$ 21,680	20,856
Weighted-average amortization period	16 years
Sales Force Network [Member]
Finite Life Intangible Assets [Abstract]
Gross carrying amount	$ 11,598	11,598
Accumulated amortization	$ 11,598	11,598
Weighted-average amortization period	15 years
Trademarks [Member]
Finite Life Intangible Assets [Abstract]
Gross carrying amount	$ 6,145	5,938
Accumulated amortization	$ 2,938	2,462
Weighted-average amortization period	11 years
Other [Member]
Finite Life Intangible Assets [Abstract]
Gross carrying amount	$ 71,095	92,331
Accumulated amortization	$ 23,998	$ 46,250
Weighted-average amortization period	10 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Name Accounting Standards Codification
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- 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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
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