Intangible assets consist of the following:


(dollar amounts in thousands)	Estimated useful life in years	Average remaining life in years	Cost	Accumulated amortization	Net book value
June 30, 2026
Customer relationships	6 to 11	5.7	$75,783	$(37,404)	$38,379
Non-compete agreements	5	1.9	10,916	(8,308)	2,608
Trade name	0.75 to 8	2.6	2,068	(1,596)	472
Total amortizing			88,767	(47,308)	41,459
Trade name - non-amortizing	Indefinite		171	—	171
Total			$88,938	$(47,308)	$41,630

December 31, 2025
Customer relationships	6 to 11	6.1	$75,734	$(33,243)	$42,491
Non-compete agreements	5	2.1	10,806	(7,351)	3,455
Trade name	0.75 to 8	3.3	2,000	(1,512)	488
Total amortizing			88,540	(42,106)	46,434
Trade name - non-amortizing	Indefinite		171	—	171
Total			$88,711	$(42,106)	$46,605

Goodwill consisted of the following:


(dollar amounts in thousands)	Mobile Modular		Portable Storage		Enviroplex		Total
Balance at December 31, 2025	$	319,574	$	11,212	$	1,798	$	332,584
Goodwill acquired through business combinations		4,764		—		—		4,764
Balance at June 30, 2026	$	324,338	$	11,212	$	1,798	$	337,348

The Company assesses potential impairment of its goodwill and intangible assets when there is evidence that events or circumstances have occurred that would indicate the recovery of an asset’s carrying value is unlikely. The Company also assesses potential impairment of its goodwill and intangible assets with indefinite lives on an annual basis regardless of whether there is evidence of impairment. If indicators of impairment were to be present in intangible assets used in operations and future discounted cash flows were not expected to be sufficient to recover the asset’s carrying amount, an impairment loss would be charged to expense in the period identified. The amount of an impairment loss that would be recognized is the excess of the asset’s carrying value over its fair value. Factors the Company considers important, which may cause impairment include, among others, significant changes in the manner of use of the acquired asset, negative industry or economic trends, and significant underperformance relative to historical or projected operating results. The Company last conducted a qualitative analysis of its goodwill and intangible assets in the fourth quarter 2025, with no indicators of impairment. In addition, no impairment triggering events occurred during the three and six months ended June 30, 2026. For the six months ended June 30, 2026, goodwill increased $4.8 million from the acquisition of a regional provider of temporary and permanent modular space solutions. Determining fair value of a reporting unit is judgmental and involves the use of significant estimates and assumptions. The Company bases its fair value estimates on assumptions that it believes are reasonable but are uncertain and subject to changes in market conditions.

Intangible assets with finite useful lives are amortized over their respective useful lives. Amortization expense incurred during the six months ended June 30, 2026 and 2025, was $5.2 million for both periods. Based on the carrying values at June 30, 2026, and assuming no subsequent impairment of the underlying assets, the amortization expense is expected to be $5.0 million for the remainder of fiscal year 2026, $10.0 million in 2027, $8.7 million in 2028, $5.1 million in 2029, $3.4 million in 2030 and $3.1 million in 2031.