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Retirement Benefits (Schedule of Estimated Remaining Cash Contributions) (Details) $ in Thousands	Jun. 30, 2020 USD ($)
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in the currect fiscal year	$ 1,865
United Kingdom | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in the currect fiscal year	34
Germany [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Estimated future employer contributions in the currect fiscal year	$ 330

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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

Amount of contribution expected to be received by defined benefit plan from employer in remainder of current fiscal year. Excludes contribution previously paid by employer in current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921

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