Deferred Revenue (Tables)

9 Months Ended

Sep. 30, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Deferred Revenue

Deferred revenue consisted of the following (in thousands):

	As of September 30, 2020		As of December 31, 2019
Product, subscription and support, current	$	478,235	$	508,580
Professional services, current	88,966		95,364
Total deferred revenue, current	567,201		603,944
Product, subscription and support, non-current	325,152		369,589
Professional services, non-current	1,262		1,034
Total deferred revenue, non-current	326,414		370,623
Total deferred revenue	$	893,615	$	974,567

Changes in the balance of deferred revenue for the periods presented are as follows (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2020			2019			2020			2019
Deferred revenue, beginning of period	$	892,846		$	912,749		$	974,567		$	934,828
Billings for the period	239,229			248,572			612,130			651,895
Revenue recognized	(238,460		)	(225,914		)	(693,082		)	(654,066		)
Assumed in connection with acquisitions	—			—			—			2,750
Deferred revenue, end of period	$	893,615		$	935,407		$	893,615		$	935,407

Schedule of Expected Recognition of Remaining Performance Obligations

We expect to recognize these remaining performance obligations as follows (in percentages):

	Total	Less than 1 year	1-2 years	2-3 years	More than 3 years
Deferred revenue	100%	63%	23%	10%	4%
Backlog	100%	45%	35%	16%	4%