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Commitments and Contingencies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020 item
Commitments And Contingencies Disclosure [Line Items]
Number of operating leases	28
Minimum [Member]
Commitments And Contingencies Disclosure [Line Items]
Lease terms	1 year
Maximum [Member]
Commitments And Contingencies Disclosure [Line Items]
Lease terms	12 years

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- Definition

Commitments And Contingencies Disclosure [Line Items]

+ References

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- Definition

Number Of Operating Leases

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- Definition

Term of lessee's finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

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