The increase in goodwill from December 31, 2023 to June 30, 2024, is attributable to the CSI Acquisition. See Note 2 (“Acquisitions”) for more details. The change in the carrying amount of goodwill by reportable segment for the six months ended June 30, 2024, is preliminary and subject to change. Actual allocation by segment will be disclosed in subsequent filings.


	Total Goodwill
Balance as of December 31, 2023	$	305,553
Acquisition of CSI Compressco	97,837
Balance as of June 30, 2024	$	403,390

The Company’s identifiable intangible assets consist of the following as of June 30, 2024, and December 31, 2023 (in thousands):


	As of June 30, 2024
	Original Cost		Accumulated Amortization		Net Amount		Remaining Weighted Average Amortization Period (years)	Remaining Weighted Average Amortization Period (years) for acquired intangibles
Trade name	$	19,400	$	(3,826)	$	15,574	10.9	4.8
Customer relationships	191,400		(41,761)		149,639		13.1	14.9
Total identifiable intangible assets	$	210,800	$	(45,587)	$	165,213


	As of December 31, 2023
	Original Cost		Accumulated Amortization		Net Amount		Remaining Weighted Average Amortization Period (years)
Trade name	$	13,000	$	(3,181)	$	9,819	15.1
Customer relationships	150,000		(36,931)		113,069		12.8
Total identifiable intangible assets	$	163,000	$	(40,112)	$	122,888

Amortization expense was $3.1 million and $5.5 million for the three and six months ended June 30, 2024, and is recorded within depreciation and amortization on the condensed consolidated statements of operations. Amortization expense was $2.4 million and $4.7 million for the three and six months ended June 30, 2023, respectively.

As of June 30, 2024, the following is a summary of future minimum amortization expense for identified intangible assets (in thousands):


	Amount
Years ending December 31,
Remainder of 2024	$	7,026
2025	13,514
2026	13,514
2027	13,514
2028	13,514
Thereafter	104,131
Total	$	165,213