CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Total revenues		$ 299,910	$ 297,618	$ 591,395	$ 503,473
Operating expenses
Cost of revenue	[1]	147,346	155,240	313,183	270,181
Research and development		35,578	39,235	74,602	75,429
Selling and marketing		24,455	32,962	54,538	62,392
General and administrative		29,758	49,319	65,684	80,836
Depreciation and amortization		33,635	26,744	65,533	48,610
Total operating expenses		270,772	303,500	573,540	537,448
Operating income (loss)		29,138	(5,882)	17,855	(33,975)
Other income (expense)
Interest expense		(14,142)	(15,323)	(31,313)	(26,937)
Interest income		2,954	2,997	5,854	6,030
Other, net		2,041	1,402	(7,717)	(510)
Total other income (expense)		(9,147)	(10,924)	(33,176)	(21,417)
Income (loss) before income taxes		19,991	(16,806)	(15,321)	(55,392)
Income tax expense (benefit)		5,916	(22,531)	(4,969)	(35,154)
Net income (loss)		$ 14,075	$ 5,725	$ (10,352)	$ (20,238)
Income (loss) per common share
Basic (in dollars per share)		$ 0.12	$ 0.05	$ (0.09)	$ (0.17)
Diluted (in dollars per share)		$ 0.12	$ 0.05	$ (0.09)	$ (0.17)
Weighted average common shares outstanding
Basic (in shares)		116,033	116,586	116,019	116,287
Diluted (in shares)		117,264	118,786	116,019	116,287
Software as a service and platform as a service
Revenues
Total revenues		$ 180,573	$ 172,499	$ 373,523	$ 281,056
License
Revenues
Total revenues		50,136	52,541	78,265	73,619
Maintenance
Revenues
Total revenues		52,749	51,922	106,029	107,033
Services
Revenues
Total revenues		$ 16,452	$ 20,656	$ 33,578	$ 41,765

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