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Income Taxes (Periods Subject To Examination Of Tax Returns) (Details)	12 Months Ended
	Dec. 31, 2020
US State - Missouri [Member]
Period	2019
US State - West Virginia [Member]
Period	2019
Minimum [Member] | US Federal [Member]
Period	2007
Minimum [Member] | US State - Colorado [Member]
Period	2007
Minimum [Member] | Canada [Member]
Period	2006
Minimum [Member] | Mauritius [Member]
Period	2017
Minimum [Member] | Poland [Member]
Period	2015
Minimum [Member] | Austria [Member]
Period	2015
Minimum [Member] | United Kingdom [Member]
Period	2017
Maximum [Member] | US Federal [Member]
Period	2019
Maximum [Member] | US State - Colorado [Member]
Period	2019
Maximum [Member] | Canada [Member]
Period	2019
Maximum [Member] | Mauritius [Member]
Period	2019
Maximum [Member] | Poland [Member]
Period	2019
Maximum [Member] | Austria [Member]
Period	2019
Maximum [Member] | United Kingdom [Member]
Period	2019

X

- Definition

Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

+ Details

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