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Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization	$ 55,613	$ 51,864
Cost of additions reduced by recognition of tax credits	2,224	2,639	$ 1,022
Capitalized cost of software under development	$ 291	$ 299	$ 402
Interest costs, weighted average rate	2.48%	3.04%	4.01%
Weighted average amortization period	9 years	9 years 1 month 6 days	7 years 9 months 18 days

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- Definition

Acquired Intangible Assets, Tax Credit Reduction

+ References

No definition available.

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- Definition

Finite and Indefinite-Lived intangible assets not subject to amortization

+ References

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- Definition

Interest Costs Related To Qualifying Assets, Weighted Average Rate

+ References

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- Definition

Additions made to capitalized computer software costs during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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