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PROPERTY AND EQUIPMENT, NET (Tables)
 12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Schedule of Estimated Useful Lives for Property and Equipment We provide for depreciation and amortization primarily using the straight-line method by charges to the consolidated statements of income in amounts that allocate the cost of property and equipment over their estimated useful lives as follows:
Asset Classification Estimated Useful Life
  
Buildings and improvements 
10 to 40 years
Leasehold improvements Shorter of remaining lease term or useful life of improvements
Machinery and equipment 
3 to 8 years
Office furniture and equipment 
3 to 7 years
Computer hardware and software 
3 to 7 years
Schedule of Property and Equipment
Property and equipment, net, consisted of the following:

(in thousands)December 31, 2023December 31, 2022
  
Land and improvements$22,400 $22,221 
Buildings and improvements432,038 356,049 
Leasehold improvements116,347 107,251 
Machinery and equipment431,914 404,963 
Office furniture and equipment78,941 71,625 
Computer hardware and software326,295 295,969 
Construction in progress79,059 97,310 
1,486,994 1,355,388 
Less accumulated depreciation and amortization784,817 705,914 
Total property and equipment, net$702,177 $649,474 
Schedule of Depreciation and Amortization, Capitalized Computer Software for Internal Use and Unpaid Property Equipment Reflected in Accounts Payable and Accrued Expenses
Below are the amounts of depreciation and amortization of property and equipment, capitalized computer software for internal use, unpaid property and equipment reflected in accounts payable and accrued expenses, and rental and reagent rental program instruments transferred from inventory to property and equipment:
For the Years Ended December 31,
(in thousands)202320222021
   
Depreciation and amortization expense$100,994 $96,746 $92,376 
Capitalization of internal-use software development costs during the period
$37,120 $20,329 $14,753 
Unpaid property and equipment, reflected in accounts payable and accrued liabilities at end of year
$12,061 $18,334 $19,326 
Rental and operating-type reagent rental program instruments transferred from inventory to property and equipment during the period (Note 3)
$14,608 $17,407 $11,628