Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Product and licenses	$ 227,215	$ 187,917	$ 420,298	$ 366,281
Software as a service	143,858	125,510	281,424	246,243
License updates and maintenance	322,895	272,537	638,633	537,062
Professional services	36,416	29,246	62,928	55,119
Total net revenues	730,384	615,210	1,403,283	1,204,705
Cost of net revenues:
Cost of product and license revenues	31,700	20,854	57,494	39,658
Cost of services and maintenance revenues	71,198	56,404	135,609	107,408
Amortization of product related intangible assets	24,342	17,100	49,051	33,635
Total cost of net revenues	127,240	94,358	242,154	180,701
Gross margin	603,144	520,852	1,161,129	1,024,004
Operating expenses:
Research and development	132,299	110,028	262,791	213,650
Sales, marketing and services	317,096	262,139	614,778	510,596
General and administrative	67,343	61,299	130,128	121,155
Amortization of other intangible assets	10,518	5,194	20,936	15,661
Total operating expenses	527,256	438,660	1,028,633	861,062
Income from operations	75,888	82,192	132,496	162,942
Interest income	2,021	2,828	3,983	5,906
Other (expense) income, net	(646)	525	(1,412)	1,247
Income before income taxes	77,263	85,545	135,067	170,095
Income tax expense (benefit)	12,802	(6,461)	10,918	9,822
Net income	$ 64,461	$ 92,006	$ 124,149	$ 160,273
Earnings per share:
Basic (in dollars per share)	$ 0.34	$ 0.49	$ 0.66	$ 0.86
Diluted (in dollars per share)	$ 0.34	$ 0.49	$ 0.66	$ 0.85
Weighted average shares outstanding:
Basic (in shares)	187,229	186,372	186,945	186,052
Diluted (in shares)	188,486	189,279	188,750	189,082