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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.

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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