Condensed Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Product and licenses	$ 206,179	$ 206,252	$ 628,002	$ 594,507
Software as a service	207,050	190,757	606,544	537,705
License updates and maintenance	398,171	379,585	1,178,053	1,128,043
Professional services	29,851	36,676	97,310	110,576
Total net revenues	841,251	813,270	2,509,909	2,370,831
Cost of net revenues:
Cost of product and license revenues	28,059	34,859	93,077	83,833
Cost of services and maintenance revenues	93,829	91,295	281,440	270,218
Amortization of product related intangible assets	14,959	19,140	45,744	56,225
Impairment of product related intangible assets	1,128	960	1,128	1,335
Total cost of net revenues	137,975	146,254	421,389	411,611
Gross margin	703,276	667,016	2,088,520	1,959,220
Operating expenses:
Research and development	126,887	139,128	375,607	423,972
Sales, marketing and services	291,848	293,587	883,045	896,250
General and administrative	93,686	79,799	281,601	241,697
Amortization of other intangible assets	7,387	12,534	22,067	32,967
Impairment of other intangible assets	0	64,404	0	64,404
Restructuring	12,061	13,766	62,142	62,251
Separation	17,580	0	46,190	0
Total operating expenses	549,449	603,218	1,670,652	1,721,541
Income from operations	153,827	63,798	417,868	237,679
Interest income	4,193	3,004	12,108	8,679
Interest expense	11,254	11,075	33,605	33,196
Other income (expense), net	494	(2,369)	(781)	(13,480)
Income before income taxes	147,260	53,358	395,590	199,682
Income tax expense (benefit)	15,359	(2,567)	59,328	11,595
Net income	$ 131,901	$ 55,925	$ 336,262	$ 188,087
Earnings per share:
Basic (in dollars per share)	$ 0.85	$ 0.35	$ 2.17	$ 1.17
Diluted (in dollars per share)	$ 0.84	$ 0.35	$ 2.15	$ 1.16
Weighted average shares outstanding:
Basic (in shares)	155,525	160,359	154,847	160,359
Diluted (in shares)	157,532	161,777	156,697	161,716