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Goodwill
 9 Months Ended
Sep. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract]  
Goodwill

6. Goodwill

The following table sets forth the changes in the carrying amount of goodwill (in thousands):

 

Balance as of December 31, 2020 (1)

 

$

785,305

 

BMC Merger

 

 

1,751,604

 

All other acquisitions

 

 

614,609

 

Gypsum Divestiture

 

 

(9,924

)

Balance as of September 30, 2021 (1)

 

$

3,141,594

 

 

(1)Goodwill is presented net of accumulated impairment losses of $44.6 million.

 

In 2021, the change in the carrying amount of goodwill is attributable to the BMC Merger and other acquisitions as well as the Gypsum Divestiture. As a result of the change in segments discussed in Note 1 to these condensed consolidated financial statements, the Company has determined that the reporting units used in the analysis of goodwill impairment should align with its three operating segments. As of September 30, 2021, no triggering events have occurred. The amount allocated to goodwill is attributable to the assembled workforce, synergies and expected growth from the expanded product and service offerings of BMC and our other acquisitions. The goodwill recognized from the BMC Merger and CTF will not be deductible for tax purposes. The $516.6 million of goodwill recognized from the other acquisitions is expected to be deductible for tax purposes and will be amortizable ratably over a 15-year period for tax purposes.