Goodwill represents the excess of the purchase price over the fair value of net assets of acquired businesses. Goodwill is not amortized but is evaluated for impairment on an annual basis or more frequently if impairment indicators arise. No goodwill impairment was recognized during either the three or nine months ended September 30, 2026 and 2025.


	December 31, 2025		Acquisitions		September 30, 2026

Environmental Services	$	46,645	$	10,659	$	57,304
Dietary	33,152		—		33,152
Total Goodwill	$	79,797	$	10,659	$	90,456

The Company’s other intangible assets consist of customer relationships, trade names, patents and non-compete agreements which were obtained through acquisitions and are recorded at their fair values at the date of acquisition. Intangible assets with determinable lives are amortized on a straight-line basis over their estimated useful lives. The weighted-average amortization period of customer relationships, trade names, patents and non-compete agreements are approximately 11 years, 10 years, 4 years and 4 years, respectively.


	Intangible Assets		Weighted-average amortization period
	(in thousands)
Customer relationships	$	8,783	11.3 years
Trade names	2,918		10.9 years
Non-compete agreements	528		4.5 years
Total	$	12,229

The following table sets forth the estimated amortization expense for intangibles subject to amortization for the remainder of 2026, the following five fiscal years and thereafter:


Period/Year	Total Amortization Expense
	(in thousands)
October to December 31, 2026	$	941
2027	$	2,302
2028	$	1,719
2029	$	1,718
2030	$	1,694
2031	$	1,609
Thereafter	$	6,877

Amortization expense for the three months ended September 30, 2026 and 2025 was $0.9 million and $0.7 million. Amortization expense for the nine months ended September 30, 2026 and 2025 was $2.3 million and $3.1 million, respectively.