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Acquired Intangible Assets and Goodwill
 12 Months Ended
Dec. 31, 2022
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, 2022December 31, 2021
Weighted-Average Useful
Life
(years)		GrossAccumulated
Amortization		NetGrossAccumulated
Amortization		Net
Trade names9.3$82,690 $(14,856)$67,834 $71,040 $(6,004)$65,036 
Developed technology3.366,340 (38,465)27,875 63,480 (17,285)46,195 
Customer relationship1081,360 (14,797)66,563 81,360 (6,662)74,698 
$230,390 $(68,118)$162,272 $215,880 $(29,951)$185,929 

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 $38,167 and $26,901 for the years ended December 31, 2022 and 2021, respectively.

The following table presents our estimate of remaining amortization expense for intangible assets that existed as of December 31, 2022:
2023$38,988 
202423,741 
202517,618 
202617,380 
202715,633
Thereafter48,912
Estimated remaining amortization expense$162,272 

Goodwill—The carrying amounts of goodwill by reportable segment were as follows:
Real Estate ServicesRentalsMortgageTotal
Balance as of December 31, 2021
$250,231 $159,151 $— $409,382 
Goodwill resulting from acquisition— — 51,967 51,967 
Balance as of December 31, 2022
$250,231 $159,151 $51,967 $461,349 

For the year ended December 31, 2022, we performed a quantitative assessment and concluded there was no impairment since it was not more likely than not that the fair value of any of our reporting units was less than its carrying value. We did not recognize any goodwill impairment charges during the years ended December 31, 2022 or 2021.