Property and Equipment:

9 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Property and Equipment

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



	September 30, 2018			December 31, 2017
Machinery and equipment	$	195,278		$	220,999
Land, building and building improvements	213,764			206,846
Molds	56,304			56,253
Computer equipment and software	43,490			44,408
Furniture and fixtures	8,284			7,361
Instruments placed with customers*	58,247			15,812
Construction in progress	98,967			57,144
Total property and equipment, cost	674,334			608,823
Accumulated depreciation	(249,437		)	(210,139		)
Property and equipment, net	$	424,897		$	398,684

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*Instruments placed with customers consist of drug-delivery and monitoring systems placed with customer under operating leases.

Depreciation expense was $15.1 million and $42.8 million for the three and nine months ended September 30, 2018, respectively, and $14.0 million and $36.6 million for the three and nine months ended September 30, 2017.