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GOODWILL AND INTANGIBLE ASSETS
3 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
GOODWILL AND INTANGIBLE ASSETS GOODWILL AND INTANGIBLE ASSETS
A summary of the activity and balances related to goodwill by operating segment is as follows:
December 31,
2024 (1)
Acquisitions
Business Combination
Adjustments
March 31,
2025
Eastern$89,544 $20,989 $— $110,533 
Western357,143 — 2,455 359,598 
Mid-Atlantic510,917 16,400 (2,009)525,308 
Resource Solutions 44,662 9,434 — 54,096 
$1,002,266 $46,823 $446 $1,049,535 
(1)The December 31, 2024 amounts in the table above, including allocated goodwill between operating segments using a relative fair value approach, have been updated to conform with the movement of certain operations that took place in the three months ended March 31, 2025. See Note 13, Segment Reporting for further disclosure.
Summaries of intangible assets by type follow:
Covenants
Not-to-Compete
Customer RelationshipsTrade NamesTotal
Balance, March 31, 2025
Intangible assets
$73,347 $401,047 $26,099 $500,493 
Less accumulated amortization(36,538)(130,714)(13,709)(180,961)
$36,809 $270,333 $12,390 $319,532 

 Covenants
Not-to-Compete
Customer RelationshipsTrade NamesTotal
Balance, December 31, 2024
Intangible assets
$71,568 $377,600 $25,795 $474,963 
Less accumulated amortization(34,398)(115,305)(11,792)(161,495)
$37,170 $262,295 $14,003 $313,468 
Intangible amortization expense was $19,466 during the three months ended March 31, 2025 and $12,564 during the three months ended March 31, 2024.
A summary of intangible amortization expense estimated for each of the next five fiscal years following fiscal year 2024 and thereafter is estimated as follows:
Estimated Future Amortization Expense as of March 31, 2025 
For the remainder of the fiscal year ending December 31, 2025
$54,315 
Fiscal year ending December 31, 2026$64,833 
Fiscal year ending December 31, 2027$56,585 
Fiscal year ending December 31, 2028$48,002 
Fiscal year ending December 31, 2029$36,700 
Thereafter$59,097