Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2014

Commitments and Contingencies [Abstract]

Schedule of Future Minimum Annual Lease Payments

Future minimumannual lease payments under all non-cancelable operating leases with an initial term in excess of one year as of December 31, 2014 are as follows:

	Operating lease payments
Year ending December 31,	(U.S. $ in thousands)
2015	$	12,723
2016		11,002
2017		7,097
2018		6,607
2019		6,044
Thereafter		24,607
	$	68,080