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Intangible Assets and Deferred Charges
 3 Months Ended
Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Deferred Charges Intangible Assets and Deferred Charges
Intangible Assets
Intangible assets represent the fair value of intellectual, non-physical assets resulting from business acquisitions and are amortized over their estimated useful life using either an accelerated or straight-line method over a period of 15 years.
The balance of intangible assets from continuing operations subject to amortization are as follows:
March 31, 2024December 31, 2023
(in thousands)Gross Carrying AmountAccumulated AmortizationGross Carrying AmountAccumulated Amortization
Definite-lived intangible assets:
Customer related$14,604 $(7,052)$14,604 $(6,685)
Trademarks and trade names150 (17)150 (17)
Other500 (56)500 (56)
Total definite-lived intangible assets$15,254 $(7,125)$15,254 $(6,758)
Estimated amortization expense related to intangible assets for the next five years are as follows:
(in thousands)
Remainder of 2024$1,121 
20251,324 
20261,102 
2027930 
2028786 
2029673 
Thereafter2,193 

Deferred Charges
Deferred charges represent debt issuance costs and are amortized over their estimated useful lives using the straight-line method over a period of four years.
The balance of deferred charges subject to amortization are as follows:
(in thousands)March 31, 2024December 31, 2023
Deferred charges, gross$398 $398 
Accumulated amortization of deferred charges(319)(294)
Deferred charges, net$79 $104