OTHER FINANCIAL STATEMENT INFORMATION - Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Finished goods	$ 60,843	$ 65,308
Raw materials	43,367	46,081
Work-in-process	3,856	3,251
Service-related spares	5,521	6,309
Total	$ 113,587	$ 120,949