CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Revenues
Revenues		$ 285,186	$ 291,485
Operating expenses
Cost of revenue	[1]	159,485	165,837
Research and development		34,514	39,024
Selling and marketing		28,138	30,083
General and administrative		27,775	35,926
Depreciation and amortization		31,584	31,898
Total operating expenses		281,496	302,768
Operating income (loss)		3,690	(11,283)
Other income (expense)
Interest expense		(11,475)	(17,171)
Interest income		2,854	2,900
Other, net		(1,382)	(9,758)
Total other income (expense)		(10,003)	(24,029)
Loss before income taxes		(6,313)	(35,312)
Income tax benefit		(4,368)	(10,885)
Net loss		$ (1,945)	$ (24,427)
Loss per common share
Basic (in dollars per share)		$ (0.02)	$ (0.21)
Diluted (in dollars per share)		$ (0.02)	$ (0.21)
Weighted average common shares outstanding
Basic (in shares)		117,491	116,006
Diluted (in shares)		117,491	116,006
Software as a service and platform as a service
Revenues
Revenues		$ 195,746	$ 192,950
License
Revenues
Revenues		21,202	28,129
Maintenance
Revenues
Revenues		52,363	53,280
Services
Revenues
Revenues		$ 15,875	$ 17,126

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