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Goodwill and Intangibles
 3 Months Ended
Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangibles GOODWILL AND INTANGIBLES
Goodwill
The change in carrying amount of goodwill was as follows (in thousands):
InstallationOtherConsolidated
Goodwill (gross) - January 1, 2023$355,226 $88,333 $443,559 
Business combinations13,540 — 13,540 
Other257 5,273 5,530 
Goodwill (gross) - March 31, 2023369,023 93,606 462,629 
Accumulated impairment losses (70,004)— (70,004)
Goodwill (net) - March 31, 2023$299,019 $93,606 $392,625 
Other changes presented in the above table primarily include adjustments for the allocation of certain acquisitions still under measurement made during the three months ended March 31, 2023, including a change in tax election that resulted in a $4.9 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 March 31,As of December 31,
 20232022
 Gross
Carrying
Amount		Accumulated
Amortization		Net
Book
Value		Gross
Carrying
Amount		Accumulated
Amortization		Net
Book
Value
Amortized intangibles:      
Customer relationships$349,019 $154,169 $194,850 $338,050 $145,722 $192,328 
Covenants not-to-compete31,207 21,028 10,179 30,899 20,086 10,813 
Trademarks and tradenames125,078 41,518 83,560 119,612 39,638 79,974 
Backlog21,635 20,623 1,012 20,815 20,457 358 
 $526,939 $237,338 $289,601 $509,376 $225,903 $283,473 
The gross carrying amount of intangibles increased approximately $17.6 million during the three months ended March 31, 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$32,834 
202439,843 
202534,301 
202630,350 
202726,064 
Thereafter126,209