CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues
Total revenues		$ 315,883	$ 354,901	$ 907,278	$ 858,374
Operating expenses
Cost of revenue	[1]	158,579	174,168	471,762	444,349
Research and development		33,573	36,543	108,175	111,972
Selling and marketing		22,154	30,417	76,692	92,809
General and administrative		37,000	27,286	102,684	108,122
Depreciation and amortization		33,395	31,169	98,928	79,779
Total operating expenses		284,701	299,583	858,241	837,031
Operating income		31,182	55,318	49,037	21,343
Other income (expense)
Interest expense		(12,925)	(18,987)	(44,238)	(45,924)
Interest income		2,927	2,988	8,781	9,018
Other, net		1,356	(2,369)	(6,361)	(2,879)
Total other income (expense)		(8,642)	(18,368)	(41,818)	(39,785)
Income (loss) before income taxes		22,540	36,950	7,219	(18,442)
Income tax expense (benefit)		6,674	5,136	1,705	(30,018)
Net income		$ 15,866	$ 31,814	$ 5,514	$ 11,576
Income per common share
Basic (in dollars per share)		$ 0.14	$ 0.27	$ 0.05	$ 0.10
Diluted (in dollars per share)		$ 0.13	$ 0.27	$ 0.05	$ 0.10
Weighted average common shares outstanding
Basic (in shares)		116,558	116,169	116,217	116,337
Diluted (in shares)		117,804	118,307	117,644	118,460
Software as a service and platform as a service
Revenues
Total revenues		$ 190,369	$ 192,952	$ 563,892	$ 474,008
License
Revenues
Total revenues		56,773	92,058	135,038	165,677
Maintenance
Revenues
Total revenues		53,049	52,638	159,078	159,671
Services
Revenues
Total revenues		$ 15,692	$ 17,253	$ 49,270	$ 59,018

[1] The cost of revenue excludes charges for depreciation but includes amortization of purchased and developed software for resale.