Revenue from Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

The following table summarizes revenue:


	Year Ended December 31,
(in thousands)	2020			2019			2018
Revenue:
Lease licenses	$	500,105		$	406,043		$	275,619
Perpetual licenses	280,745			293,587			301,098
Software licenses	780,850			699,630			576,717
Maintenance	840,597			760,574			676,883
Service	59,850			55,688			40,036
Maintenance and service	900,447			816,262			716,919
Total revenue	$	1,681,297		$	1,515,892		$	1,293,636

Direct revenue, as a percentage of total revenue	77.8		%	77.1		%	77.6		%
Indirect revenue, as a percentage of total revenue	22.2		%	22.9		%	22.4		%

Changes in Deferred Revenue

The changes in deferred revenue, inclusive of both current and long-term deferred revenue, during the years ended December 31, 2020 and 2019 were as follows:


(in thousands)	2020		2019
Beginning balance – January 1	$	365,274	$	343,174
Acquired deferred revenue	6,872		6,880
Deferral of revenue	1,687,907		1,532,549
Recognition of deferred revenue	(1,681,297)		(1,515,892)
Currency translation	10,054		(1,437)
Ending balance – December 31	$	388,810	$	365,274

Remaining Performance Obligations, Expected Timing of Satisfaction

Total revenue allocated to remaining performance obligations as of December 31, 2020 will be recognized as revenue as follows:


(in thousands)
Next 12 months	$	606,780
Months 13-24	199,909
Months 25-36	80,304
Thereafter	80,134
Total revenue allocated to remaining performance obligations	$	967,127