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Intangibles
 12 Months Ended
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangibles Intangible assets
Intangible assets other than goodwill comprised the following:
 December 31,
 20232022
Indefinite-lived licenses$153,983 $127,271 
Noncompetition agreements31,090 51,408 
Customer relationships and other56,596 53,779 
 241,669 232,458 
Accumulated amortization:
Noncompetition agreements(23,680)(39,745)
Customer relationships and other (14,765)(10,027)
 $203,224 $182,687 
Noncompetition agreements are generally amortized over four years to 10 years and customer relationships are principally amortized over 10 years to 20 years. The weighted average renewal or extension period of customer relationships was two years as of December 31, 2023 and 2022. Amortization expense from amortizable intangible assets was $8,969, $11,469, and $12,860 for 2023, 2022 and 2021, respectively.
For the years ended December 31, 2023, 2022 and 2021, the Company recognized no impairment charges on any intangible assets other than goodwill. See Note 9 for further information regarding goodwill.
Scheduled amortization expenses from amortizable intangible assets as of December 31, 2023 were as follows: 
 Noncompetition
agreements		Customer relationships and other
2024$3,049 $3,978 
20251,921 3,712 
20261,182 3,642 
2027730 3,525 
2028528 3,472 
Thereafter— 23,502 
Total$7,410 $41,831