Condensed Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Revenue	$ 778,445	$ 767,170	$ 2,366,322	$ 2,427,044
Cost of net revenues:
Total cost of net revenues	146,819	127,286	451,594	365,103
Gross profit	631,626	639,884	1,914,728	2,061,941
Operating expenses:
Research and development	145,811	130,628	436,148	406,827
Sales, marketing and services	290,240	298,659	890,444	916,801
General and administrative	91,462	81,591	280,046	262,693
Amortization of other intangible assets	19,648	701	46,615	2,097
Total operating expenses	547,161	511,579	1,653,253	1,588,418
Income from operations	84,465	128,305	261,475	473,523
Interest income	319	491	912	2,685
Interest expense	(22,809)	(16,639)	(70,074)	(48,326)
Other (expense) income, net	(2,050)	3,841	17,481	7,850
Income before income taxes	59,925	115,998	209,794	435,732
Income tax expense	8,138	17,771	5,193	43,377
Net income	$ 51,787	$ 98,227	$ 204,601	$ 392,355
Earnings per share:
Basic (in dollars per share)	$ 0.42	$ 0.80	$ 1.65	$ 3.17
Diluted (in dollars per share)	$ 0.41	$ 0.78	$ 1.62	$ 3.10
Weighted average shares outstanding:
Basic (in shares)	124,515	123,255	123,896	123,835
Diluted (in shares)	126,321	125,863	126,140	126,407
Subscription [Member]
Revenues:
Revenue	$ 383,154	$ 262,604	$ 1,099,554	$ 774,290
Product and License [Member]
Revenues:
Revenue	25,365	87,218	128,283	390,009
Cost of net revenues:
Cost of net revenues	14,360	16,238	61,235	57,554
Support and Services [Member]
Revenues:
Revenue	369,926	417,348	1,138,485	1,262,745
Subscription, Support and Service [Member]
Cost of net revenues:
Cost of net revenues	112,067	102,755	338,839	282,672
Product [Member]
Cost of net revenues:
Amortization of product related intangible assets	$ 20,392	$ 8,293	$ 51,520	$ 24,877