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External-Use Software Development Costs
 12 Months Ended
Dec. 31, 2025
Research and Development [Abstract]  
External-Use Software Development Costs External-Use Software Development Costs
The carrying amounts of external-use software development costs were as follows:
December 31,
20252024
(In thousands)
Gross carrying amount$266,523 $249,335 
Accumulated amortization(212,326)(190,899)
External-use software development costs, net (1)
$54,197 $58,436 
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(1)     Included in other long-term assets in the Consolidated Balance Sheets.
The Company recorded $21.8 million, $24.9 million, and $28.7 million to cost of product revenues for amortization of external-use software development costs for the years ended December 31, 2025, 2024, and 2023, respectively.
The estimated future amortization expenses for external-use software development costs were as follows:
December 31, 2025
(In thousands)
2026$18,896 
202713,791 
20289,933 
20297,306 
20303,443 
Thereafter828 
Total$54,197