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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2016
Goodwill and Other Intangible Assets [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 |  | $ | 141,132 |  |  | $ | 8,853 |  |  | $ | 2,329 |  |  | $ | 152,314 |
Accumulated impairment charges |  |  | (40,552 | ) |  |  | (8,853 | ) |  |  | — |  |  |  | (49,405 | )
Balance at December 27, 2014: |  |  | 100,580 |  |  |  | — |  |  |  | 2,329 |  |  |  | 102,909 |
Additions |  |  | 19,087 |  |  |  | 1 |  |  |  | 2,087 |  |  |  | 21,175 |
Disposition |  |  | (2,418 | ) |  |  | — |  |  |  | — |  |  |  | (2,418 | )
Currency translation |  |  | (1,414 | ) |  |  | — |  |  |  | — |  |  |  | (1,414 | )
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: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 160,128 |  |  |  | 8,854 |  |  |  | 4,416 |  |  |  | 173,398 |
Accumulated impairment charges |  |  | (40,552 | ) |  |  | (8,853 | ) |  |  | — |  |  |  | (49,405 | )
Goodwill, net |  | $ | 119,576 |  |  | $ | 1 |  |  | $ | 4,416 |  |  | $ | 123,993 |
(1) Includes finalization of the purchase price allocation adjustment for Great Lakes of $4.1 million |
Carrying amount of intangible assets | 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 |
The carrying amount of intangible assets at December 26, 2015 was as follows:
(In thousands) |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Carrying Amount |
Customer relationships |  | $ | 30,882 |  |  | $ | (1,488 | ) |  | $ | 29,394 |
Non-compete agreements |  |  | 6,534 |  |  |  | (2,838 | ) |  |  | 3,696 |
Patents and technology |  |  | 9,798 |  |  |  | (5,323 | ) |  |  | 4,475 |
Trade names and licenses |  |  | 4,160 |  |  |  | (574 | ) |  |  | 3,586 |
Other |  |  | 213 |  |  |  | (728 | ) |  |  | (515 | )
Other intangible assets |  | $ | 51,587 |  |  | $ | (10,951 | ) |  | $ | 40,636 |
Amortization expense for intangible assets | Amortization expense for intangible assets was $4.3 million in 2016, $4.1 million in 2015, and $3.5 million in 2014. Future amortization expense is estimated as follows:
(In thousands) |  | Amount |
2017 |  | $ | 2,996 |
2018 |  |  | 2,735 |
2019 |  |  | 2,655 |
2020 |  |  | 2,458 |
2021 |  |  | 2,272 |
Thereafter |  |  | 23,052 |
Expected amortization expense |  | $ | 36,168 |

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