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Goodwill and Intangibles | 9 Months Ended
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Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangibles | GOODWILL AND INTANGIBLES Goodwill The change in carrying amount of goodwill by reporting segment was as follows (in thousands):
| Installation |  | Other |  | Consolidated
Goodwill (gross) - January 1, 2023 | $ | 355,226 |  |  | $ | 88,333 |  |  | $ | 443,559 |
Business combinations | 15,860 |  |  | — |  |  | 15,860 |
Other | 525 |  |  | 5,273 |  |  | 5,798 |
Goodwill (gross) - September 30, 2023 | 371,611 |  |  | 93,606 |  |  | 465,217 |
Accumulated impairment losses | (70,004) |  |  | — |  |  | (70,004) |
Goodwill (net) - September 30, 2023 | $ | 301,607 |  |  | $ | 93,606 |  |  | $ | 395,213 |
Other changes presented in the above table primarily include one immaterial acquisition and adjustments for the allocation of certain acquisitions still under measurement made during the nine months ended September 30, 2023, including measurement period adjustments primarily associated with a tax election that resulted in a $4.4 million change in purchase price for a 2022 acquisition. For additional information regarding changes to goodwill resulting from acquisitions, see Note 17, Business Combinations. We test goodwill for impairment annually during the fourth quarter of our fiscal year or earlier if there is an impairment indicator. Accumulated impairment losses included within the above table were incurred over multiple periods and were all associated with the Installation segment, with the latest impairment charge being recorded during the year ended December 31, 2010. Intangibles, net The following table provides the gross carrying amount, accumulated amortization and net book value for each major class of intangibles (in thousands):
| As of September 30, |  | As of December 31,
| 2023 |  | 2022
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Book Value
Amortized intangibles: |  |  |  |  |  |  |  |  |  |  |
Customer relationships | $ | 351,806 |  |  | $ | 170,134 |  |  | $ | 181,672 |  |  | $ | 338,050 |  |  | $ | 145,722 |  |  | $ | 192,328 |
Covenants not-to-compete | 31,439 |  |  | 22,852 |  |  | 8,587 |  |  | 30,899 |  |  | 20,086 |  |  | 10,813 |
Trademarks and tradenames | 126,054 |  |  | 45,411 |  |  | 80,643 |  |  | 119,612 |  |  | 39,638 |  |  | 79,974 |
Backlog | 21,635 |  |  | 21,228 |  |  | 407 |  |  | 20,815 |  |  | 20,457 |  |  | 358 |
| $ | 530,934 |  |  | $ | 259,625 |  |  | $ | 271,309 |  |  | $ | 509,376 |  |  | $ | 225,903 |  |  | $ | 283,473 |
The gross carrying amount of intangibles increased approximately $21.6 million during the nine months ended September 30, 2023 primarily due to business combinations. For more information, see Note 17, Business Combinations. Remaining estimated aggregate annual amortization expense is as follows (amounts, in thousands, are for the fiscal year ended):
Remainder of 2023 | $ | 10,717 |
2024 | 40,186 |
2025 | 34,645 |
2026 | 30,693 |
2027 | 26,408 |
Thereafter | 128,660 |

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