Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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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.

+ References

No definition available.

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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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.

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No definition available.

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SEGMENT INFORMATION (Carrying Amount of Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Goodwill, Gross		$ 170,791
Goodwill, Impaired, Accumulated Impairment Loss		0
Goodwill [Roll Forward]
Goodwill, beginning balance		171,745	$ 198,598
Foreign currency translation adjustment		(5,315)	11,484
Goodwill, ending balance		170,791	171,745	$ 198,598
Impairment of goodwill	$ (15,369)	0	(15,369)	(34,818)
Goodwill, Written off Related to Sale of Business Unit		(6,269)
Tech & Clearance [Member]
Segment Reporting Information [Line Items]
Goodwill, Gross		157,477
Goodwill, Impaired, Accumulated Impairment Loss			0
Goodwill [Roll Forward]
Goodwill, beginning balance		152,162	163,646
Foreign currency translation adjustment		(5,315)	11,484
Goodwill, ending balance		157,477	152,162	163,646
Impairment of goodwill			0
Goodwill, Written off Related to Sale of Business Unit		0
Healthcare Segment [Member]
Segment Reporting Information [Line Items]
Goodwill, Gross		0
Goodwill, Impaired, Accumulated Impairment Loss			0
Goodwill [Roll Forward]
Goodwill, beginning balance		6,269	6,269
Foreign currency translation adjustment		0	0
Goodwill, ending balance		0	6,269	6,269
Impairment of goodwill			0
Goodwill, Written off Related to Sale of Business Unit		(6,269)
Corporate & Other Segment [Member]
Segment Reporting Information [Line Items]
Goodwill, Gross		13,314
Goodwill, Impaired, Accumulated Impairment Loss			0
Goodwill [Roll Forward]
Goodwill, beginning balance		13,314	28,683
Foreign currency translation adjustment		0	0
Goodwill, ending balance		13,314	13,314	$ 28,683
Impairment of goodwill			$ (15,369)
Goodwill, Written off Related to Sale of Business Unit		$ 0