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Revenue Recognition - Narrative (Details) - USD ($)
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Disaggregation of Revenue [Line Items]      
Additions, net, during the period $ 469,342,000 $ 439,503,000  
Unbilled revenue 2,300,000 2,200,000  
Capitalized contract acquisition costs 8,600,000 8,500,000 $ 9,600,000
Amortization of deferred contract costs 8,871,000 8,785,000 9,755,000
Deferred contract costs, impairment losses 0 0 $ 0
Deferred contract costs, current 5,000,000 5,100,000  
Deferred contract costs, noncurrent $ 400,000 600,000  
AMiON      
Disaggregation of Revenue [Line Items]      
Additions, net, during the period   $ 2,900,000