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Acquired Intangible Assets and Goodwill
 12 Months Ended
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Acquired Intangible Assets and Goodwill Acquired Intangible Assets and Goodwill
Acquired Intangible Assets—The following table presents the gross carrying amount and accumulated amortization of intangible assets:
December 31, 2023December 31, 2022
Weighted-Average Useful
Life
(years)		GrossAccumulated
Amortization		NetGrossAccumulated
Amortization		Net
Trade names9.3$82,690 $(24,290)$58,400 $82,690 $(14,856)$67,834 
Developed technology3.366,340 (59,883)6,457 66,340 (38,465)27,875 
Customer relationship1081,360 (22,933)58,427 81,360 (14,797)66,563 
$230,390 $(107,106)$123,284 $230,390 $(68,118)$162,272 

Our intangible assets are amortized on a straight-line basis over their respective estimated useful lives to a split between general and administrative and cost of revenue for customer relationships and trade names; and developed technology intangible assets are split between general and administrative expense, cost of revenue, and technology and development expense in our consolidated statements of comprehensive loss. Amortization expense amounted to $38,988 and $38,167 for the years ended December 31, 2023 and 2022, respectively.

The following table presents our estimate of remaining amortization expense for intangible assets that existed as of December 31, 2023:
2024$23,741 
202517,618 
202617,380 
202715,633 
202815,050
Thereafter33,862
Estimated remaining amortization expense$123,284 

Goodwill—The carrying amounts of goodwill by reportable segment were as follows:
Real Estate ServicesRentalsMortgageTotal
Balance as of December 31, 2023 and 2022
$250,231 $159,151 $51,967 $461,349 

We did not recognize any goodwill impairment charges during the years ended December 31, 2023 or 2022.