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RESTRUCTURING - Restructuring Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$ 117	$ 202	$ 0
Accrual:
Continuing Operations	4,263	4,431	5,326
Discontinued Operations	0	0	3,794
Total	4,263	4,431	9,120
Payments	(3,176)	(4,516)	(8,918)
Balance at end of period	1,204	117	202
Severance and other employee related costs
Accrual:
Continuing Operations	4,263	4,431	5,326
Discontinued Operations	0	0	2,899
Total	4,263	4,431	8,225
Payments	(3,176)	(4,516)	(8,023)
Other restructuring expense
Accrual:
Continuing Operations	0	0	0
Discontinued Operations	0	0	895
Total	0	0	895
Payments	$ 0	$ 0	$ (895)

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- Definition

Disposal Group, Including Discontinued Operation, Restructuring Charges

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- Definition

Restructuring Charges and Disposal Group, Including Discontinued Operation, Restructuring Charges

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- Definition

Restructuring Reserve and Disposal Group, Including Discontinued Operations, Restructuring Reserve

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- 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
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 17
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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-Publisher FASB
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-Topic 420
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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