Special Charges Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 07, 2017	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016	Dec. 31, 2016	Apr. 03, 2016
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Inventories		$ 161,750		$ 161,750		$ 149,584
Restructuring Charges		3,566	$ 3,259	5,025	$ 4,422
Special and restructuring (recoveries) charges, net		(5,520)	1,335	(7,788)	2,111
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		(9,700)		(12,200)
Energy [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		1,947	525	2,969	247
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Instruments Classified in Shareholders' Equity, Transfers out of Level 3				12,200
Special and restructuring (recoveries) charges, net		(9,505)	1,383	(11,773)	2,270
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		(9,700)		(12,200)
Advanced Flow Solutions [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		1,619	2,734	2,056	4,175
Special and restructuring (recoveries) charges, net		3,748	(48)	3,748	(161)
Corporate Segment [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Special and restructuring (recoveries) charges, net		237	0	237	2
Inventory Related Charges [Member] | Advanced Flow Solutions [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Inventories		400		400			$ 100
Inventory Related Charges [Member] | Brazil Closure [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges			1,900	100
Employee Severance [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		2,197	1,304	2,699	1,443
Employee Severance [Member] | Energy [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		803	638	975	736
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down			1,400		2,300
Employee Severance [Member] | Aerospace [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges			666		707
Employee Severance [Member] | Advanced Flow Solutions [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		1,394		1,724
Divestiture [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		3,849		3,849
Divestiture [Member] | Aerospace & Defense [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		3,748		3,748
Divestiture [Member] | Corporate Segment [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		101		101
Acquisitions [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		136	(48)	136	(161)
Acquisitions [Member] | Energy [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges			0		0
Acquisitions [Member] | Aerospace [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges			(48)		(161)
Acquisitions [Member] | Corporate Segment [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges		136	0	136	0
Facility Closing [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down		195	1,383	427	2,272
Facility Closing [Member] | Energy [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges			(113)		(489)
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down		195	1,383	427	2,270
Facility Closing [Member] | Aerospace [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges			2,068		3,468
Facility Closing [Member] | Corporate Segment [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down					2
Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down				3,800
Brazil Manufacturing Operations [Member] | Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Abandonment [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Disposal Group, Including Discontinued Operation, Assets		1,600		1,600
Disposal Group, Including Discontinued Operation, Assets Held-For-Sale		900		900
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net		200		200
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents		500		500
Schroedahl [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Business Combination, Acquisition Related Costs			$ 100		$ 200
Downstream [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Instruments Classified in Shareholders' Equity, Period Increase (Decrease)		9,700		12,200
Contingent Consideration Classified as Equity, Fair Value Disclosure		$ 0		$ 0		$ 12,200
Subsequent Event [Member] | Divestiture [Member]
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]
Restructuring Charges	$ 5,274