Property and Equipment:

3 Months Ended

Mar. 31, 2021

Property, Plant and Equipment [Abstract]

Property and Equipment [Text Block]

Property and Equipment

Property and equipment consisted of the following (in thousands): 

	March 31, 2021		December 31, 2020
Machinery and equipment	$	293,653	$	291,331
Land, building and building improvements	241,608		241,199
Molds	60,381		60,381
Computer equipment and software	98,780		98,311
Furniture and fixtures	7,712		7,767
Instruments placed with customers(1)	91,909		90,383
Construction in progress	55,757		53,724
Total property and equipment, cost	849,800		843,096
Accumulated depreciation	(390,728)		(376,468)
Property and equipment, net	$	459,072	$	466,628

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(1) Instruments placed with customers consist of drug-delivery and monitoring systems placed with customers under operating leases.

    Depreciation expense was $16.3 million and $15.2 million for the three months ended March 31, 2021 and 2020, respectively.