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International Retirement Plan (Schedule of Accumulated And Projected Benefit Obligations) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits, Description [Abstract]
Projected benefit obligation	$ 8,658	$ 8,434	$ 7,727
Accumulated benefit obligation	$ 7,587	$ 7,570

X

- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

+ Details

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Period Type:	instant

X

- Definition

Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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Namespace Prefix:	us-gaap_
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Period Type:	instant

X

- References

No definition available.

+ Details

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