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Note 6 - Goodwill and Intangible Assets, Net - Other Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Gross carrying amount $ 251,261 $ 251,072
Accumulated amortization (154,386) (137,320)
Net carrying amount $ 96,875 113,752
Minimum [Member]    
Estimated useful life (Year) 3 years  
Maximum [Member]    
Estimated useful life (Year) 15 years  
Customer Relationships [Member]    
Gross carrying amount $ 190,069 189,911
Accumulated amortization (117,189) (104,528)
Net carrying amount $ 72,880 85,383
Weighted average remaining life (Year) 7 years 2 months 12 days  
Customer Relationships [Member] | Minimum [Member]    
Estimated useful life (Year) 5 years  
Customer Relationships [Member] | Maximum [Member]    
Estimated useful life (Year) 12 years  
Other Intangible Assets [Member]    
Gross carrying amount $ 61,192 61,161
Accumulated amortization (37,197) (32,792)
Net carrying amount $ 23,995 $ 28,369
Other Intangibles [Member]    
Weighted average remaining life (Year) 5 years 9 months 18 days  
Other Intangibles [Member] | Minimum [Member]    
Estimated useful life (Year) 2 years  
Other Intangibles [Member] | Maximum [Member]    
Estimated useful life (Year) 12 years