Property, Plant and Equipment Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022
Property, Plant and Equipment [Line Items]
Land and land improvements	$ 82,795	$ 84,015
Buildings and leasehold improvements	651,071	654,851
Machinery and equipment	899,970	903,649
Information systems	223,455	222,620
Radioisotope	603,761	597,641
Construction in progress	402,795	356,013
Total property, plant, and equipment	2,863,847	2,818,789
Less: accumulated depreciation and depletion	(1,290,510)	(1,266,213)
Property, plant, and equipment, net	$ 1,573,337	$ 1,552,576