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Special Charges Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Apr. 02, 2017
Apr. 03, 2016
Dec. 31, 2016
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
Inventories $ 147,915   $ 149,584
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down 232 $ 889  
ERROR in label resolution. 1,458 1,163  
Special and restructuring (recoveries) charges, net (2,268) 776  
Energy [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down 232 887  
ERROR in label resolution. 1,022 (278)  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Instruments Classified in Shareholders' Equity, Transfers out of Level 3 2,500    
Special and restructuring (recoveries) charges, net (2,268) 887  
Advanced Flow Solutions [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down 0 0  
ERROR in label resolution. 436 1,441  
Special and restructuring (recoveries) charges, net 0 (113)  
Inventory Related Charges [Member] | Advanced Flow Solutions [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
Inventories 200 100  
Inventory Related Charges [Member] | Brazil Closure [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
ERROR in label resolution.   1,900  
Facility Closing [Member] | Energy [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down 200    
Employee Severance [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
ERROR in label resolution. 501 139  
Employee Severance [Member] | Energy [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down   900  
ERROR in label resolution. 172 98  
Employee Severance [Member] | Advanced Flow Solutions [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
ERROR in label resolution. 329 41  
Acquisitions [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
ERROR in label resolution.   (113)  
Acquisitions [Member] | Energy [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
ERROR in label resolution.   0  
Acquisitions [Member] | Advanced Flow Solutions [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
ERROR in label resolution.   $ (113)  
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 1,800    
Disposal Group, Including Discontinued Operation, Assets Held-For-Sale 900    
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net 200    
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents 700    
Schroedahl [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
Business Combination, Acquisition Related Costs     100
Downstream [Member]      
Effects on Future Earnings and Cash Flows Resulting from Exit Plan [Line Items]      
Contingent Consideration Classified as Equity, Fair Value Disclosure $ 9,700   $ 12,200