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SEGMENT AND RELATED INFORMATION - Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 330.6	$ 319.3	$ 313.0	$ 302.5	$ 295.6	$ 290.2	$ 297.7	$ 286.8	$ 1,265.4	$ 1,170.3	$ 1,243.5
Depreciation and amortization									5.1	5.3	5.9
Operating Income (Loss)	(26.4)								71.3	27.7	(3.5)
Assets	551.4				566.1				551.4	566.1	710.1
Operating Segments | IPG
Segment Reporting Information [Line Items]
Net sales									791.8	715.6	698.6
Depreciation and amortization									3.9	3.6	3.8
Operating Income (Loss)									69.6	34.3	43.7
Assets	220.4				201.5				220.4	201.5	203.8
Operating Segments | ETG
Segment Reporting Information [Line Items]
Net sales									473.6	451.1	441.7
Depreciation and amortization									0.5	0.8	0.5
Operating Income (Loss)									24.5	14.5	13.0
Assets	188.0				165.2				188.0	165.2	140.5
Operating Segments | ETG - discontinued
Segment Reporting Information [Line Items]
Assets	0.0				109.4				0.0	109.4	166.4
Operating Segments | NATG
Segment Reporting Information [Line Items]
Net sales									0.0	0.0	97.8
Depreciation and amortization									0.0	0.0	0.6
Operating Income (Loss)									(0.6)	(2.8)	(38.2)
Assets	13.6				6.9				13.6	6.9	151.6
Corporate and Other
Segment Reporting Information [Line Items]
Net sales									0.0	3.6	5.4
Depreciation and amortization									0.7	0.9	1.0
Operating Income (Loss)									(22.2)	(18.3)	(22.0)
Assets	$ 129.4				$ 83.1				$ 129.4	$ 83.1	$ 47.8

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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