Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Property, plant and equipment, net consisted of the following:

	December 31,			December 31,
	2017			2016
	(U.S. $ in thousands)
Machinery and equipment	$	133,656		$	128,187
Buildings and improvements		131,993			121,970
Computer equipment and software		48,237			48,917
Office equipment, furniture and fixtures		17,893			16,393
Land		19,234			19,591
		351,013			335,058
Accumulated depreciation		(155,147	)		(131,327	)
		195,866			203,731
Construction work in progress		4,085			4,684
	$	199,951		$	208,415