Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Measurements [Abstract]

Schedule of Assets and Liabilities Carried at Fair Value on a Recurring Basis

	September 30, 2015
	Level 2			Level 3			Total
	U.S. $ in thousands
Assets:
Foreign exchange forward contracts not
designated as hedging instruments	$	480		$	-		$	480
Foreign exchange forward contracts
designated as hedging instruments		94			-			94
Liabilities:
Foreign exchange forward contracts not
designated as hedging instruments		(391	)		-			(391)
Foreign exchange forward contracts               designated as hedging instruments		(173	)		-			(173)
Obligations in connection with acquisitions		-			(8,105	)		(8,105)
	$	10		$	(8,105	)	$	(8,095)
	December 31, 2014
	Level 2			Level 3			Total
	U.S. $ in thousands
Assets:
Foreign exchange forward contracts not
designated as hedging instruments	$	3,753		$	-		$	3,753
Liabilities:
Foreign exchange forward contracts not
designated as hedging instruments		(2,901	)		-			(2,901)
Foreign exchange forward contracts designated
as hedging instruments		(1,243	)		-			(1,243)
Obligations in connection with acquisitions		-			(35,656	)		(35,656)
	$	(391	)	$	(35,656	)	$	(36,047)

Schedule of Reconciliation of Fair Value Measurements of Assets and Liabilities Utilizing Level 3 Inputs

	Nine months ended			Year ended
	September 30, 2015			December 31, 2014
	U.S. $ in thousands
Fair value at the beginning of the period	$	35,656		$	29,025
Settlements		(4,593	)		(10,795	)
Additions		-			43,576
Change in fair value recognized in earnings		(22,958	)		(26,150	)
Fair value at the end of the period	$	8,105		$	35,656