Property and Equipment:

6 Months Ended

Jun. 30, 2018

Property, Plant and Equipment [Abstract]

Property and Equipment

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



	June 30, 2018			December 31, 2017
Machinery and equipment	$	211,648		$	220,999
Land, building and building improvements	208,182			206,846
Molds	56,187			56,253
Computer equipment and software	44,821			44,408
Furniture and fixtures	8,285			7,361
Instruments placed with customers*	39,038			15,812
Construction in progress	83,788			57,144
Total property and equipment, cost	651,949			608,823
Accumulated depreciation	(236,222		)	(210,139		)
Property and equipment, net	$	415,727		$	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 $13.6 million and $27.8 million for the three and six months ended June 30, 2018, respectively, as compared to $14.4 million and $22.6 million for the three and six months ended June 30, 2017.