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Corporate Restructuring Costs (Reconciliation of Restructuring Liability) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, beginning balance	$ 3,500
Charges	4,146
Payments	(7,360)
Restructuring Reserve, ending balance	286
Employee Severance and Other Employee Transition Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, beginning balance	2,722
Charges	1,046
Payments	(3,557)
Restructuring Reserve, ending balance	211
Recruitment and Relocation Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, beginning balance	224
Charges	2,093
Payments	(2,242)
Restructuring Reserve, ending balance	75
Third-party and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, beginning balance	554
Charges	1,007
Payments	$ (1,561)

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
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-Publisher FASB
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-Topic 230
-SubTopic 10
-Section 45
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-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585

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- Definition

Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
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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

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
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