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Goodwill and Other Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Goodwill [Roll Forward]    
Goodwill   $ 152,314
Accumulated impairment charges, beginning balance   (49,405)
Goodwill, net, Beginning Balance $ 120,252 102,909
Additions 4,601 [1] 21,175
Disposition   (2,418)
Currency translation (860) (1,414)
Goodwill 173,398  
Accumulated impairment changes, ending balance (49,405)  
Goodwill, net, Ending Balance 123,993 120,252
Purchase price allocation adjustments 4,100  
Piping Systems [Member]    
Goodwill [Roll Forward]    
Goodwill   141,132
Accumulated impairment charges, beginning balance   (40,552)
Goodwill, net, Beginning Balance 115,835 100,580
Additions 4,601 [1] 19,087
Disposition   (2,418)
Currency translation (860) (1,414)
Goodwill 160,128  
Accumulated impairment changes, ending balance (40,552)  
Goodwill, net, Ending Balance 119,576 115,835
Industrial Metals [Member]    
Goodwill [Roll Forward]    
Goodwill   8,853
Accumulated impairment charges, beginning balance   (8,853)
Goodwill, net, Beginning Balance 1 0
Additions 0 [1] 1
Disposition   0
Currency translation 0 0
Goodwill 8,854  
Accumulated impairment changes, ending balance (8,853)  
Goodwill, net, Ending Balance 1 1
Climate [Member]    
Goodwill [Roll Forward]    
Goodwill   2,329
Accumulated impairment charges, beginning balance   0
Goodwill, net, Beginning Balance 4,416 2,329
Additions 0 [1] 2,087
Disposition   0
Currency translation 0 0
Goodwill 4,416  
Accumulated impairment changes, ending balance 0  
Goodwill, net, Ending Balance $ 4,416 $ 4,416
[1] Includes finalization of the purchase price allocation adjustment for Great Lakes of $4.1 million.