Other Intangible Assets

9 Months Ended

Sep. 30, 2021

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Other Intangible Assets

Note 8—Other Intangible Assets

The Company’s other intangible assets consist of customer relationships, patents, non-compete agreements, and trademarks 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 the Company's intangible assets was 9.9 years.

The following table sets forth the estimated amortization expense for intangibles subject to amortization for the remainder of 2021, the following five fiscal years and thereafter:

Period/Year	Total Amortization Expense
	(in thousands)
October 1 to December 31, 2021	$	1,105
2022	$	4,416
2023	$	3,420
2024	$	2,286
2025	$	2,286
2026	$	2,270
Thereafter	$	1,256

Amortization expense for the three and nine months ended September 30, 2021 was $1.1 million and $3.3 million, respectively. Amortization expense for the three and nine months ended September 30, 2020 was $1.0 million and $3.1 million, respectively.