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Property, Plant and Equipment (Tables)
12 Months Ended
Apr. 30, 2023
Property, Plant and Equipment [Abstract]  
Components Of Property, Plant And Equipment
The components of property, plant and equipment were:
 APRIL 30,
(in thousands)20232022
Land$4,475 $4,431 
Buildings and improvements121,903 119,066 
Buildings and improvements - financing leases11,164 11,164 
Machinery and equipment331,146 324,417 
Machinery and equipment - financing leases29,869 31,341 
Software29,322 28,115 
Construction in progress45,710 22,794 
Total property, plant and equipment573,589 541,328 
Less accumulated amortization and depreciation(354,174)(327,520)
Property, plant and equipment, net$219,415 $213,808