Quarterly report pursuant to Section 13 or 15(d)

Depreciation and Amortization Expense

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Depreciation and Amortization Expense
 9 Months Ended
Sep. 30, 2024
Property, Plant and Equipment [Abstract]  
Depreciation and Amortization Expense Depreciation and Amortization Expense
Depreciation and amortization expense consisted of the following:

Three Months Ended Nine Months Ended
  September 30, September 30,
2024 2023 2024 2023
(in thousands)
Intangible asset amortization $ 14,542  $ 15,124  $ 43,741  $ 47,784 
Internally developed software amortization (1)
16,155  13,500  60,261  36,988 
Property and equipment depreciation 4,833  3,776  11,153  11,213 
Total depreciation and amortization $ 35,530  $ 32,400  $ 115,155  $ 95,985 
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(1) $1.3 million and $14.2 million of net capitalized internally developed software costs was written off and included within internally developed software amortization expense during the three and nine months ended September 30, 2024, respectively. See Note 4—Internally Developed Software, Net for further information.