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Intangible Assets
 6 Months Ended
Jun. 30, 2022
Intangible Assets, Net (Excluding Goodwill) [Abstract]  
Intangible Assets Intangible Assets
The gross carrying amount and accumulated amortization for definite-lived intangible assets were as follows:
June 30, 2022December 31, 2021
(in thousands)Gross Carrying AmountAccumulated AmortizationNet Carrying ValueGross Carrying AmountAccumulated AmortizationNet Carrying Value
Trade names$93,355 $(12,389)$80,966 $36,304 $(8,353)$27,951 
Customer relationships197,362 (40,524)156,838 92,947 (29,269)63,678 
Other (1)
8,753 (3,631)5,122 8,159 (3,180)4,979 
Total$299,470 $(56,544)$242,926 $137,410 $(40,802)$96,608 
(1)    Other primarily consists of non-compete agreements.

Amortization expense for definite-lived intangible assets was $9.7 million and $15.1 million for the three and six months ended June 30, 2022, respectively and $2.5 million and $5.0 million for the three and six months ended June 30, 2021, respectively. Amortization expense related to intangible assets was recorded in General and administrative expenses. The remaining weighted-average useful lives of intangible assets as of June 30, 2022 was 7.0 years for trade names and 14.3 years for customer relationships.

The estimated aggregate amortization expense for the remaining year 2022 and each of the next five years are as follows:
(in thousands)Amortization
Remaining 2022$17,074 
202332,994 
202433,335 
202530,549 
202628,134 
202724,044 
Thereafter76,796 
Total$242,926