Correction of Immaterial Errors Immaterial Correction to Prior Period Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Total Revenue	$ 201,940	$ 130,588	$ 126,012	$ 140,177	$ 197,157	$ 148,296	$ 138,023	$ 113,206	$ 598,717	$ 596,682	$ 507,566
Gross profit	186,782	114,883	110,486	124,959	181,667	133,936	123,284	99,979	537,110	538,866	456,922
Operating Income (Loss)	116,296	44,734	42,939	53,390	112,611	71,143	61,358	36,027	257,359	281,139	207,928
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest									279,357	301,527	226,353
Provision for (benefit from) income taxes									49,686	40,165	(54,881)
Net income	$ 94,530	$ 41,826	$ 39,801	$ 53,514	$ 105,994	$ 61,951	$ 56,454	$ 36,966	$ 229,671	$ 261,362	$ 281,234
Basic (in dollars per share)	$ 1.40	$ 0.62	$ 0.58	$ 0.78	$ 1.54	$ 0.89	$ 0.80	$ 0.52	$ 3.38	$ 3.74	$ 3.90
Earnings Per Share, Diluted	$ 1.39	$ 0.61	$ 0.58	$ 0.77	$ 1.52	$ 0.88	$ 0.79	$ 0.51	$ 3.34	$ 3.69	$ 3.85
Deferred income taxes									$ 28,101	$ (27,129)	$ (109,131)
Contract assets									(28,084)	(57,660)	14,932
Net Cash Provided by (Used in) Operating Activities									243,258	238,313	206,936
License [Member]
Total Revenue									388,180	404,581	318,442
Maintenance
Total Revenue									178,139	163,567	158,838
Services and other
Total Revenue									$ 32,398	28,534	30,286
Previously Reported [Member]
Total Revenue		$ 132,027	$ 124,732	$ 134,091	$ 195,769	$ 147,984	$ 140,423	$ 114,169		598,345	518,859
Gross profit		116,322	109,206	118,873	180,279	133,624	125,684	100,942		540,529	468,215
Operating Income (Loss)		46,173	41,659	47,304	111,223	70,831	63,758	36,990		282,802	219,221
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest										303,190	237,646
Provision for (benefit from) income taxes										40,456	(56,057)
Net income		$ 43,521	$ 38,275	$ 46,284	$ 103,865	$ 61,587	$ 59,217	$ 38,066		$ 262,734	$ 293,703
Basic (in dollars per share)		$ 0.64	$ 0.56	$ 0.68	$ 1.51	$ 0.89	$ 0.84	$ 0.54		$ 3.76	$ 4.07
Earnings Per Share, Diluted		$ 0.64	$ 0.56	$ 0.67	$ 1.49	$ 0.88	$ 0.83	$ 0.53		$ 3.71	$ 4.03
Previously Reported [Member] | License [Member]
Total Revenue										$ 404,122	$ 326,549
Previously Reported [Member] | Maintenance
Total Revenue										165,436	161,065
Previously Reported [Member] | Services and other
Total Revenue										28,787	31,245
Restatement Adjustment [Member]
Total Revenue		$ (1,439)	$ 1,280	$ 6,086	$ 1,388	$ 312	$ (2,400)	$ (963)		(1,663)	(11,293)
Gross profit		(1,439)	1,280	6,086	1,388	312	(2,400)	(963)		(1,663)	(11,293)
Operating Income (Loss)		(1,439)	1,280	6,086	1,388	312	(2,400)	(963)		(1,663)	(11,293)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest										(1,663)	(11,293)
Provision for (benefit from) income taxes										(291)	1,176
Net income		$ (1,695)	$ 1,526	$ 7,230	$ 2,129	$ 364	$ (2,763)	$ (1,100)		$ (1,372)	$ (12,469)
Basic (in dollars per share)		$ (0.02)	$ 0.02	$ 0.10	$ 0.03	$ 0	$ (0.04)	$ (0.02)		$ (0.02)	$ (0.17)
Earnings Per Share, Diluted		$ (0.03)	$ 0.02	$ 0.10	$ 0.03	$ 0	$ (0.04)	$ (0.02)		$ (0.02)	$ (0.18)
Restatement Adjustment [Member] | License [Member]
Total Revenue										$ 459	$ (8,107)
Restatement Adjustment [Member] | Maintenance
Total Revenue										(1,869)	(2,227)
Restatement Adjustment [Member] | Services and other
Total Revenue										(253)	(959)
Restatement Adjustment [Member]
Net income										(1,372)	(12,469)
Deferred income taxes										(290)	1,177
Contract assets										1,662	11,292
Net Cash Provided by (Used in) Operating Activities										0	0
Previously Reported [Member]
Net income										262,734	293,703
Deferred income taxes										(26,839)	(110,308)
Contract assets										(59,322)	3,640
Net Cash Provided by (Used in) Operating Activities										$ 238,313	$ 206,936