Revenue from Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

The following table summarizes revenue:



	Year Ended December 31,
(in thousands)	2019 (ASC 606)			2018 (ASC 606)			2017 (ASC 605)
Revenue:
Lease licenses	$	406,043		$	275,619		$	376,886
Perpetual licenses	293,587			301,098			248,078
Software licenses	699,630			576,717			624,964
Maintenance	760,574			676,883			440,428
Service	55,688			40,036			29,858
Maintenance and service	816,262			716,919			470,286
Total revenue	$	1,515,892		$	1,293,636		$	1,095,250

Direct revenue, as a percentage of total revenue	77.1		%	77.6		%	75.2		%
Indirect revenue, as a percentage of total revenue	22.9		%	22.4		%	24.8		%

Changes in Deferred Revenue

The changes in deferred revenue, inclusive of both current and long-term deferred revenue, during the years ended December 31, 2019 and 2018 were as follows:



(in thousands)	2019			2018
Beginning balance – January 1	$	343,174		$	299,730
Acquired deferred revenue	6,880			2,470
Deferral of revenue	1,532,549			1,339,964
Recognition of deferred revenue	(1,515,892		)	(1,293,636		)
Currency translation	(1,437		)	(5,354		)
Ending balance – December 31	$	365,274		$	343,174

Remaining Performance Obligations, Expected Timing of Satisfaction

Total revenue allocated to remaining performance obligations as of December 31, 2019 will be recognized as revenue as follows:



(in thousands)
Next 12 months	$	569,751
Months 13-24	177,364
Months 25-36	93,097
Thereafter	30,531
Total revenue allocated to remaining performance obligations	$	870,743