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Goodwill and Intangible Assets, Net (Tables)
 9 Months Ended
Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Carrying Value of Goodwill Attributable to Each Reportable Segment The changes in the carrying value of goodwill balances by reportable segment were as follows:
U.S. RegionsU.S. FederalCanadaAlternative FuelsOtherTotal
Carrying Value of Goodwill
Balance, December 31, 2022$39,593 $3,981 $3,236 $— $23,823 $70,633 
Goodwill acquired during the year— — — — 6,855 6,855 
Currency effects— — (8)— (137)(145)
Balance, September 30, 2023$39,593 $3,981 $3,228 $— $30,541 $77,343 
Schedule of Gross Carrying Amount and Accumulated Amortization of Intangible Assets Definite-lived intangible assets, net consisted of the following:
As of September 30, 2023As of December 31, 2022
Gross carrying amount$36,646 32,277 
Less - accumulated amortization(29,299)(27,584)
Intangible assets, net$7,347 $4,693 
Schedule of Amortization Expense The table below sets forth amortization expense:
Three Months Ended September 30,Nine Months Ended September 30,
Asset typeLocation2023202220232022
Customer contractsCost of revenues$— $138 $— $459 
All other intangible assetsSelling, general and administrative expenses690 304 1,681 1,003 
Total amortization expense$690 $442 $1,681 $1,462