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Impairment and Restructuring Charges (Details Textual) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Positions	Sep. 30, 2016 USD ($) Positions	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Restructuring and Related Cost [Line Items]
Exit costs		$ 0.8	$ 0.6	$ 2.3
Tangible Asset Impairment Charges		1.2		3.8
Severance Costs	$ 1.3	3.3	3.2	12.6
Restructuring, Settlement and Impairment Provisions	1.3	5.3	3.8	$ 18.7
Restructuring accrual	4.7		$ 4.7		$ 10.1	$ 11.3
WorkforceReduction [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | Positions			50	175
Severance Costs	0.7	1.7	$ 1.5	$ 7.7
Mobile Industries [Member]
Restructuring and Related Cost [Line Items]
Exit costs		0.3	0.1	1.6
Tangible Asset Impairment Charges		1.2		3.8
Severance Costs	1.3	2.9	3.1	7.7
Restructuring, Settlement and Impairment Provisions	1.3	4.4	3.2	13.1
Mobile Industries [Member] | WorkforceReduction [Member]
Restructuring and Related Cost [Line Items]
Severance Costs				2.9
Process Industries [Member]
Restructuring and Related Cost [Line Items]
Exit costs		0.5	0.0	0.7
Tangible Asset Impairment Charges		0.0		0.0
Severance Costs	0.0	0.4	0.1	4.9
Restructuring, Settlement and Impairment Provisions	0.0	0.9	0.1	5.6
Process Industries [Member] | WorkforceReduction [Member]
Restructuring and Related Cost [Line Items]
Severance Costs				4.8
Corporate Segment [Member]
Restructuring and Related Cost [Line Items]
Exit costs		0.0	0.5	0.0
Tangible Asset Impairment Charges		0.0		0.0
Severance Costs	0.0	0.0	0.0	0.0
Restructuring, Settlement and Impairment Provisions	0.0	0.0	0.5	0.0
Pulaski [Member]
Restructuring and Related Cost [Line Items]
Restructuring, Settlement and Impairment Provisions			$ 8.1
Pulaski [Member] | WorkforceReduction [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | Positions			120
Severance Costs	$ 0.2		$ 1.3
Benoni [Member]
Restructuring and Related Cost [Line Items]
Tangible Asset Impairment Charges				0.5
Benoni [Member] | WorkforceReduction [Member]
Restructuring and Related Cost [Line Items]
Restructuring and Related Cost, Number of Positions Eliminated | Positions			85
Severance Costs				0.8
Altavista Bearing Plant [Member] [Member]
Restructuring and Related Cost [Line Items]
Tangible Asset Impairment Charges		0.7		3.1
Severance Costs		$ 0.2		$ 1.7
Restructuring, Settlement and Impairment Provisions			$ 11.5

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