Table of Content 8. INTANGIBLE ASSETS A summary of intangible assets as of December 31, 2023 and 2022 is as follows (in thousands): December 31, 2023 Gross Net Carrying Accumulated Carrying Amount Amortization Amount Customer relationships $ 164,305 $ (102,630) $ 61,675 Trade names 20,262 (19,742) 520 Technology 2,300 (1,802) 498 Licenses 683 (683) — Intangible assets $ 187,550 $ (124,857) $ 62,693 December 31, 2022 Gross Net Carrying Accumulated Carrying Amount Amortization Amount Customer relationships $ 165,231 $ (91,296) $ 73,935 Non-compete agreements 4,281 (4,281) — Trade names 20,563 (19,830) 733 Technology 2,707 (1,978) 729 Licenses 840 (830) 10 Other 12,983 (12,983) — Intangible assets $ 206,605 $ (131,198) $ 75,407 Amortization expense on intangible assets for the years ended December 31, 2023 and 2022 was $12.7 million, and $12.9 million, respectively. Amortization expense for intangible assets is forecasted to be approximately $12.4 million, $12.4 million, $12.0 million, $11.3 million, and $6.4 million in 2024, 2025, 2026, 2027 and 2028, respectively. The weighted-average amortization period for intangible assets subject to amortization was 13.8 years and 13.7 years as of December 31, 2023 and 2022, respectively. The weighted-average amortization period as of December 31, 2023 is 13.8 years for customer relationships, 13.6 years for trade name and 10.0 years for technology. 9. OTHER ACCRUED LIABILITIES A summary of other accrued liabilities as of December 31, 2023 and 2022 is as follows (in thousands): December 31, 2023 2022 Payroll and other compensation expenses $ 39,943 $ 48,507 Legal and professional accruals 53,972 46,665 Insurance accruals 7,170 7,483 Property, sales and other non-income related taxes 7,248 7,348 Accrued interest 4,487 3,963 Volume discounts 2,479 2,050 Other accruals 2,790 3,251 Other accrued liabilities $ 118,089 $ 119,267 43