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Property, Plant and Equipment (Tables)
12 Months Ended
Mar. 31, 2023
Notes To Financial Statements [Abstract]  
Property, Plant and Equipment
Information related to the major categories of our depreciable assets is as follows:
 March 31,20232022
Land and land improvements (1)
$84,313 $84,015 
Buildings and leasehold improvements691,933 654,851 
Machinery and equipment994,188 903,649 
Information systems247,873 222,620 
Radioisotope637,920 597,641 
Construction in progress (1)
478,316 356,013 
Total property, plant, and equipment3,134,543 2,818,789 
Less: accumulated depreciation and depletion(1,429,031)(1,266,213)
Property, plant, and equipment, net$1,705,512 $1,552,576 
(1) Land is not depreciated. Construction in progress is not depreciated until placed in service.
Schedule of Change in Asset Retirement Obligation [Table Text Block] The following table summarizes the activity in the liability for asset retirement obligations.
Asset Retirement Obligations
Balance at March 31, 2021$13,330 
Liabilities incurred during the period86 
Liabilities settled during the period(3)
Accretion expense and change in estimate146 
Foreign currency and other(16)
Balance at March 31, 2022$13,543 
Liabilities incurred during the period86 
Liabilities settled during the period(625)
Accretion expense and change in estimate104 
Foreign currency and other23 
Balance at March 31, 2023$13,131