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Property, Plant and Equipment (Notes)
 6 Months Ended
Sep. 30, 2020
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Information related to the major categories of our depreciable assets is as follows:
 September 30,
2020		March 31,
2020
Land and land improvements (1)
$67,407 $65,994 
Buildings and leasehold improvements546,273 531,267 
Machinery and equipment722,017 682,488 
Information systems182,104 181,112 
Radioisotope547,395 508,593 
Construction in progress (1)
196,016 159,731 
Total property, plant, and equipment2,261,212 2,129,185 
Less: accumulated depreciation and depletion(1,085,146)(1,017,330)
Property, plant, and equipment, net$1,176,066 $1,111,855 
(1)Land is not depreciated. Construction in progress is not depreciated until placed in service.