Condensed Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues:
Revenue	$ 812,111	$ 798,929	$ 1,587,877	$ 1,659,874
Cost of net revenues:
Total cost of net revenues	161,306	122,240	304,775	237,817
Gross profit	650,805	676,689	1,283,102	1,422,057
Operating expenses:
Research and development	146,179	140,531	290,337	276,199
Sales, marketing and services	306,920	291,529	600,204	618,142
General and administrative	93,594	100,264	188,584	181,102
Amortization of other intangible assets	19,435	694	26,967	1,396
Total operating expenses	566,128	533,018	1,106,092	1,076,839
Income from operations	84,677	143,671	177,010	345,218
Interest income	272	589	593	2,194
Interest expense	(22,905)	(17,076)	(47,265)	(31,687)
Other income, net	6,635	1,911	19,531	4,009
Income before income taxes	68,679	129,095	149,869	319,734
Income tax expense (benefit)	5,913	16,189	(2,945)	25,606
Net income	$ 62,766	$ 112,906	$ 152,814	$ 294,128
Earnings per share:
Basic (in dollars per share)	$ 0.51	$ 0.91	$ 1.24	$ 2.37
Diluted (in dollars per share)	$ 0.50	$ 0.90	$ 1.21	$ 2.32
Weighted average shares outstanding:
Basic (in shares)	124,230	123,522	123,580	124,128
Diluted (in shares)	126,003	125,735	126,019	126,659
Subscription [Member]
Revenues:
Revenue	$ 374,271	$ 243,450	$ 716,400	$ 511,686
Product and License [Member]
Revenues:
Revenue	58,683	129,933	102,918	302,791
Cost of net revenues:
Cost of net revenues	25,160	20,060	46,875	41,316
Support and Services [Member]
Revenues:
Revenue	379,157	425,546	768,559	845,397
Subscription, Support and Service [Member]
Cost of net revenues:
Cost of net revenues	116,027	93,877	226,772	179,917
Product [Member]
Cost of net revenues:
Amortization of product related intangible assets	$ 20,119	$ 8,303	$ 31,128	$ 16,584