Quarterly report [Sections 13 or 15(d)]

Intangible Assets - Schedule of Intangible assets (Detail)

v3.26.1
Intangible Assets - Schedule of Intangible assets (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Intangible Asset, Finite-Lived [Line Items]    
Intangibles subject to amortization, Gross Carrying Amount $ 46,450 $ 46,450
Intangibles subject to amortization, Accumulated Amortization 8,743 7,788
Total intangible amortization 37,707 38,662
Intangibles not subject to amortization, Gross Carrying Amount 50,726 51,478
Intangibles not subject to amortization, Accumulated Amortization 0 0
Intangibles not subject to amortization, Net Carrying Amount 50,726 51,478
Customer Relationships [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Intangibles subject to amortization, Gross Carrying Amount 19,600 19,600
Intangibles subject to amortization, Accumulated Amortization 4,584 4,228
Total intangible amortization $ 15,016 $ 15,372
Customer Relationships [Member] | Minimum [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Intangibles subject to amortization, Weighted Average Amortization Period 8 years 8 years
Customer Relationships [Member] | Maximum [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Intangibles subject to amortization, Weighted Average Amortization Period 20 years 20 years
Technology and Technical Know-How [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Intangibles subject to amortization, Gross Carrying Amount $ 26,550 $ 26,550
Intangibles subject to amortization, Accumulated Amortization 3,892 3,318
Total intangible amortization $ 22,658 $ 23,232
Technology and Technical Know-How [Member] | Minimum [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Intangibles subject to amortization, Weighted Average Amortization Period 9 years 9 years
Technology and Technical Know-How [Member] | Maximum [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Intangibles subject to amortization, Weighted Average Amortization Period 20 years 20 years
Goodwill [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Intangibles not subject to amortization, Weighted Average Amortization Period Indefinite Indefinite
Intangibles not subject to amortization, Gross Carrying Amount $ 37,326 $ 38,078
Intangibles not subject to amortization, Net Carrying Amount $ 37,326 $ 38,078
Tradename [Member]    
Intangible Asset, Finite-Lived [Line Items]    
Intangibles subject to amortization, Weighted Average Amortization Period 3 years 3 years
Intangibles subject to amortization, Gross Carrying Amount $ 300 $ 300
Intangibles subject to amortization, Accumulated Amortization 267 242
Total intangible amortization $ 33 $ 58
Intangibles not subject to amortization, Weighted Average Amortization Period Indefinite Indefinite
Intangibles not subject to amortization, Gross Carrying Amount $ 13,400 $ 13,400
Intangibles not subject to amortization, Net Carrying Amount $ 13,400 $ 13,400