Revenue (Tables)

6 Months Ended

Jun. 30, 2018

Our typical performance obligations include the following:



Performance Obligation	When performance obligation is typically satisfied	When payment is typically due	How standalone selling price is typically estimated
Product revenue
Modular hardware	When customer obtains control of the product (point in time)	Within 30-90 days of shipment	Observable in transactions without multiple performance obligations
Software licenses	When software media is delivered to customer or made available for download electronically, and the applicable license period has begun (point-in-time)	Within 30-90 days of the beginning of license period	Established pricing practices for software licenses bundled with maintenance, which are separately observable in renewal transactions
Extended hardware warranty	Ratably over the course of the support contract (over time)	At the beginning of the contract period	Observable in renewal transactions
Other related support offerings	As work is performed (over time) or course is delivered (point in time)	Within 30-90 days of delivery	Observable in transactions without multiple performance obligations
Software maintenance revenue
Software maintenance	Ratably over the course of the support contract (over time)	At the beginning of the contract period	Observable in renewal transactions

Total net sales based on the disaggregation criteria described above are as follows:



			Three Months Ended June 30,
(In thousands)			(Unaudited)
	2018					2017 (1)

Net sales:	Point-in-Time		Over Time	Total		Point-in-Time		Over Time	Total
Americas	$	105,670	24,121	$	129,791	$	102,034	19,614	$	121,648
EMEIA	90,487		19,554	110,041		77,485		23,064	100,549
APAC	93,251		7,926	101,177		87,330		9,082	96,412
Total net sales (2)	$	289,408	51,601	$	341,009	$	266,849	51,760	$	318,609
(1): As discussed in Note 1, prior periods have not been adjusted for adoption of ASU 2014-09
(2): Net sales contains hedging gain and losses, which do not represent revenues recognized from customers. See Note - 5 Derivatives for more information on the impact of our hedging activities on our results of operations



			Six Months Ended June 30,
(In thousands)			(Unaudited)
	2018					2017 (1)

Net sales:	Point-in-Time		Over Time	Total		Point-in-Time		Over Time	Total
Americas	$	202,211	47,301	$	249,512	$	200,338	39,749	$	240,087
EMEIA	177,394		38,059	215,453		149,528		45,760	195,288
APAC	171,937		16,004	187,941		166,947		16,392	183,339
Total net sales (2)	$	551,542	101,364	$	652,906	$	516,813	101,901	$	618,714
(1): As discussed in Note 1, prior periods have not been adjusted for adoption of ASU 2014-09
(2): Net sales contains hedging gain and losses, which do not represent revenues recognized from customers. See Note - 5 Derivatives for more information on the impact of our hedging activities on our results of operations

Changes in deferred revenue, current and non-current, during the six months ended June 30, 2018 were as follows:



	Amount
	(In thousands)
Deferred Revenue at December 31, 2017	$	154,380
Impact of adopting new revenue standard	(10,064		)
Deferred Revenue at January 1, 2018	$	144,316
Deferral of revenue billed in current period, net of recognition	91,732
Recognition of revenue deferred in prior periods	(76,519		)
Foreign currency translation impact	(2,528		)
Balance as of June 30, 2018 (unaudited)	$	157,001