Special Charges (Restructuring Programs Summary) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Jul. 02, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Accrued restructuring charges			$ 874	$ 882	$ 1,309
Total restructuring charges, net	$ 16,910		5,186	5,848	2,559
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down					879
Charges paid / settled, net			(861)	(5,856)	(2,986)
Accrued restructuring charges	$ 882		5,199	874	882
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			7,345
Divestiture [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			5,951
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Facility related expenses			(1,423)	1,044	528
Restructuring Reserve [Roll Forward]
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down				921
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			6,609	4,804	2,031
Energy Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			(1,181)	3,661	54
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			(12,200)
Energy Segment | Divestiture [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			(5,868)
Energy Segment | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Facility related expenses			(1,785)	854	85
Energy Segment | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			604	2,807	(31)
Employee Severance [Member] | Aerospace & Defense [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net		$ 1,500
Advanced Flow Solutions [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			595	626	2,505
Advanced Flow Solutions [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Facility related expenses			35	190	443
Advanced Flow Solutions [Member] | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			560	436	2,062
Industrial Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			5,772	1,561
Industrial Segment | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Facility related expenses			327
Industrial Segment | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			5,445	1,561
Corporate [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net					$ 13,096
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			7,345
Corporate [Member] | Divestiture [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			1,881
Corporate [Member] | Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down				0
Aerospace and Defense Segment [Member] | Divestiture [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			0
Aerospace and Defense Segment [Member] | Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down				0
Industrial Segment [Member] | Divestiture [Member]
Restructuring Reserve [Roll Forward]
Total restructuring charges, net			9,938
Industrial Segment [Member] | Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down				0
Disposal Group, Held-for-sale, Not Discontinued Operations
Restructuring Reserve [Roll Forward]
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down		$ 3,800
Two Thousands Eighteen Actions Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			(5,186)	(5,434)
Two Thousands Eighteen Actions Restructuring Charges [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			(1,423)	(1,964)
Two Thousands Eighteen Actions Restructuring Charges [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			(6,609)	(3,470)
Two Thousands Eighteen Actions Restructuring Charges [Member] | Energy Segment
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			1,181	(3,516)
Two Thousands Eighteen Actions Restructuring Charges [Member] | Energy Segment | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			1,785	(1,964)
Two Thousands Eighteen Actions Restructuring Charges [Member] | Energy Segment | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			(604)	(1,552)
Two Thousands Eighteen Actions Restructuring Charges [Member] | Aerospace and Defense Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			(595)	(382)
Two Thousands Eighteen Actions Restructuring Charges [Member] | Aerospace and Defense Segment [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			(35)	0
Two Thousands Eighteen Actions Restructuring Charges [Member] | Aerospace and Defense Segment [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			(560)	(382)
Two Thousands Eighteen Actions Restructuring Charges [Member] | Industrial Segment [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			(5,772)	(1,536)
Two Thousands Eighteen Actions Restructuring Charges [Member] | Industrial Segment [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			(327)	0
Two Thousands Eighteen Actions Restructuring Charges [Member] | Industrial Segment [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Total restructuring related special charges - incurred to date			$ (5,445)	$ (1,536)