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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 26, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | Goodwill and Other Intangible Assets Goodwill The changes in the carrying amount of goodwill by segment were as follows:
(In thousands) |  | Piping Systems |  | Industrial Metals |  | Climate |  | Total
Goodwill |  | $ | 168,700 |  |  | $ | 8,854 |  |  | $ | 22,186 |  |  | $ | 199,740 |
Accumulated impairment charges |  | (40,552) |  |  | (8,853) |  |  | — |  |  | (49,405) |
Balance at December 29, 2018: |  | 128,148 |  |  | 1 |  |  | 22,186 |  |  | 150,335 |
Additions (1) |  | 1,999 |  |  | — |  |  | — |  |  | 1,999 |
Reductions (2) |  | — |  |  | — |  |  | (534) |  |  | (534) |
Currency translation |  | 1,476 |  |  | — |  |  | — |  |  | 1,476 |
Balance at December 28, 2019: |  | 131,623 |  |  | 1 |  |  | 21,652 |  |  | 153,276 |
Additions |  | 11,710 |  |  | — |  |  | 1,964 |  |  | 13,674 |
Currency translation |  | 814 |  |  | — |  |  | — |  |  | 814 |
Balance at December 26, 2020: |  |  |  |  |  |  |  |
Goodwill |  | 184,699 |  |  | 8,854 |  |  | 23,616 |  |  | 217,169 |
Accumulated impairment charges |  | (40,552) |  |  | (8,853) |  |  | — |  |  | (49,405) |
Goodwill, net |  | $ | 144,147 |  |  | $ | 1 |  |  | $ | 23,616 |  |  | $ | 167,764 |
(1) Includes finalization of the purchase price allocation adjustment for Die-Mold of $2.0 million. (2) Includes finalization of the purchase price allocation adjustment for ATCO of $0.5 million. Reporting units with recorded goodwill include Domestic Piping Systems Group, B&K LLC, Great Lakes, Heatlink Group, Die-Mold, European Operations, Jungwoo-Mueller, Westermeyer, Turbotec, ATCO, and Shoals. Several factors give rise to goodwill in the Company’s acquisitions, such as the expected benefit from synergies of the combination and the existing workforce of the acquired businesses. There were no impairment charges resulting from the 2020, 2019, or 2018 annual impairment tests as the estimated fair value of each of the reporting units exceeded its carrying value. Other Intangible Assets The carrying amount of intangible assets at December 26, 2020 was as follows:
(In thousands) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships |  | $ | 61,068 |  |  | $ | (11,676) |  |  | $ | 49,392 |
Non-compete agreements |  | 2,689 |  |  | (2,527) |  |  | 162 |
Patents and technology |  | 22,585 |  |  | (5,672) |  |  | 16,913 |
Trade names and licenses |  | 14,631 |  |  | (4,476) |  |  | 10,155 |
Other |  | 1,676 |  |  | (1,091) |  |  | 585 |
Other intangible assets |  | $ | 102,649 |  |  | $ | (25,442) |  |  | $ | 77,207 |
The carrying amount of intangible assets at December 28, 2019 was as follows:
(In thousands) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Customer relationships |  | $ | 44,832 |  |  | $ | (8,773) |  |  | $ | 36,059 |
Non-compete agreements |  | 2,499 |  |  | (2,156) |  |  | 343 |
Patents and technology |  | 19,804 |  |  | (4,060) |  |  | 15,744 |
Trade names and licenses |  | 10,155 |  |  | (3,249) |  |  | 6,906 |
Other |  | 1,676 |  |  | (646) |  |  | 1,030 |
Other intangible assets |  | $ | 78,966 |  |  | $ | (18,884) |  |  | $ | 60,082 |
Amortization expense for intangible assets was $6.1 million in 2020, $5.4 million in 2019, and $4.4 million in 2018. Future amortization expense is estimated as follows:
(In thousands) |  | Amount
2021 |  | $ | 6,393 |
2022 |  | 6,311 |
2023 |  | 6,000 |
2024 |  | 5,769 |
2025 |  | 5,743 |
Thereafter |  | 46,991 |
Expected amortization expense |  | $ | 77,207 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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