Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of the Company’s goodwill for the three-months ended March 31, 2018 were as follows:

	U.S. $ in millions
Goodwill as of January 1, 2018	$	387.1
Translation differences		0.3
Goodwill as of March 31, 2018	$	387.4

Schedule of Other Intangible Assets

Other intangible assets consisted of the following:

	March 31, 2018							December 31, 2017
	Carrying Amount,					Net		Carrying Amount,					Net
	Net of		Accumulated			Book		Net of		Accumulated			Book
	Impairment		Amortization			Value		Impairment		Amortization			Value
	U.S. $ in thousands
Developed technology	$	303,402	$	(224,922	)	$	78,480	$	304,601	$	(220,420	)	$	84,181
Patents		18,512		(14,115	)	$	4,397		19,708		(14,279	)		5,429
Trademarks and trade names		27,271		(18,590	)	$	8,681		27,248		(18,245	)		9,003
Customer relationships		106,364		(65,766	)	$	40,598		106,203		(63,435	)		42,768
Capitalized software development costs		19,541		(18,886	)	$	655		19,541		(18,800	)		741
	$	475,090	$	(342,279	)	$	132,811	$	477,301	$	(335,179	)	$	142,122

Schedule of Estimated Amortization Expense Relating to Intangible Assets

As of March 31, 2018, the estimated amortization expense relating to intangible assets currently subject to amortization for each of the following periods was as follows:

	Estimated
	amortization expense
	(U.S. $ in thousands)
Remaining 9 months of 2018	$	24,251
2019		31,964
2020		31,627
2021		31,056
2022		9,921
Thereafter		3,992
Total		132,811