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Intangible Assets
 12 Months Ended
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
Intangible assets consist of the following (in thousands):
December 31,
20242023
Customer relationships$610,527 $501,831 
Other59,153 43,319 
669,680 545,150 
Accumulated amortization(243,187)(175,463)
Intangible assets, net$426,493 $369,687 
During 2024, we periodically assessed whether any indicators of impairment existed related to our intangible assets. As of each interim period end during the year, we concluded that a triggering event had not occurred that would more likely than not reduce the fair value of our intangible assets below their carrying values.
Amortization expense recognized in 2024, 2023 and 2022 was $69,581,000, $36,231,000 and $32,892,000, respectively.
Future amortization expense for the remaining unamortized balance as of December 31, 2024 is estimated as follows (in thousands):
Years Ending December 31,
Amortization
Expense
2025$74,289 
202672,657 
202752,074 
202849,060 
202944,337 
Thereafter134,076 
Total amortization expense$426,493