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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in the carrying amount of goodwill | The changes in the carrying amount of goodwill by segment were as follows:
(In thousands) |  | Piping Systems |  | Industrial Metals |  | Climate |  | Total
Goodwill |  | $ | 156,387 |  |  | $ | 8,854 |  |  | $ | 4,416 |  |  | $ | 169,657 |
Accumulated impairment charges |  | (40,552 | ) |  | (8,853 | ) |  | — |  |  | (49,405 | )
Balance at December 26, 2015: |  | 115,835 |  |  | 1 |  |  | 4,416 |  |  | 120,252 |
Additions (1) |  | 4,601 |  |  | — |  |  | — |  |  | 4,601 |
Currency translation |  | (860 | ) |  | — |  |  | — |  |  | (860 | )
Balance at December 31, 2016: |  | 119,576 |  |  | 1 |  |  | 4,416 |  |  | 123,993 |
Additions (2) |  | 3,852 |  |  | — |  |  | — |  |  | 3,852 |
Currency translation |  | 2,448 |  |  | — |  |  | — |  |  | 2,448 |
Balance at December 30, 2017: |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | 166,428 |  |  | 8,854 |  |  | 4,416 |  |  | 179,698 |
Accumulated impairment charges |  | (40,552 | ) |  | (8,853 | ) |  | — |  |  | (49,405 | )
Goodwill, net |  | $ | 125,876 |  |  | $ | 1 |  |  | $ | 4,416 |  |  | $ | 130,293 |
(1) Includes finalization of the purchase price allocation adjustment for Great Lakes of $4.1 million. (2) Includes finalization of the purchase price allocation adjustment for Jungwoo-Mueller of $0.2 million.
Carrying amount of intangible assets | The carrying amount of intangible assets at December 30, 2017 was as follows:
(In thousands) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships |  | $ | 36,518 |  |  | $ | (4,644 | ) |  | $ | 31,874 |
Non-compete agreements |  | 2,834 |  |  | (1,497 | ) |  | 1,337 |
Patents and technology |  | 7,673 |  |  | (1,868 | ) |  | 5,805 |
Trade names and licenses |  | 4,977 |  |  | (1,575 | ) |  | 3,402 |
Other |  | 213 |  |  | (623 | ) |  | (410 | )
Other intangible assets |  | $ | 52,215 |  |  | $ | (10,207 | ) |  | $ | 42,008 |
The carrying amount of intangible assets at December 31, 2016 was as follows:
(In thousands) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships |  | $ | 29,833 |  |  | $ | (2,845 | ) |  | $ | 26,988 |
Non-compete agreements |  | 5,926 |  |  | (4,063 | ) |  | 1,863 |
Patents and technology |  | 5,922 |  |  | (1,179 | ) |  | 4,743 |
Trade names and licenses |  | 4,087 |  |  | (1,032 | ) |  | 3,055 |
Other |  | 213 |  |  | (694 | ) |  | (481 | )
Other intangible assets |  | $ | 45,981 |  |  | $ | (9,813 | ) |  | $ | 36,168 |
Amortization expense for intangible assets | Future amortization expense is estimated as follows:
(In thousands) |  | Amount
2018 |  | $ | 3,338 |
2019 |  | 3,253 |
2020 |  | 3,017 |
2021 |  | 2,747 |
2022 |  | 2,851 |
Thereafter |  | 26,802 |
Expected amortization expense |  | $ | 42,008 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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