CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
REVENUE
License	$ 326	$ 516	$ 849	$ 694	$ 511	$ 292	$ 634	$ 1,604	$ 2,385	$ 3,041	$ 2,635
Support and service	371,008	342,769	337,515	333,046	353,364	319,649	320,219	307,746	1,384,338	1,300,978	1,200,652
Hardware	12,435	10,482	10,189	11,288	13,095	13,245	12,019	12,268	44,394	50,627	52,903
Total revenue	383,769	353,767	348,553	345,028	366,970	333,186	332,872	321,618	1,431,117	1,354,646	1,256,190
COST OF SALES
Cost of license	139	280	59	252	325	193	498	181	730	1,197	1,187
Cost of support and service	210,138	198,844	191,269	185,892	195,878	184,527	181,989	174,714	786,143	737,108	680,750
Cost of hardware	9,121	7,603	6,818	8,619	9,067	9,553	7,958	8,768	32,161	35,346	38,399
Total cost of sales	219,398	206,727	198,146	194,763	205,270	194,273	190,445	183,663	819,034	773,651	720,336
GROSS PROFIT	164,371	147,040	150,407	150,265	161,700	138,913	142,427	137,955	612,083	580,995	535,854
OPERATING EXPENSES
Selling and marketing	25,696	23,571	21,903	22,127	23,365	22,732	22,231	21,751	93,297	90,079	89,004
Research and development	23,340	20,801	20,873	19,739	23,964	19,854	18,862	18,554	84,753	81,234	71,495
General and administrative	17,407	16,223	18,989	16,982	17,357	16,497	16,547	17,113	69,601	67,514	64,364
Gain on disposal of a business	(1,020)	(2,286)	36	0	(19,491)	0	0	0	(3,270)	(19,491)	(6,874)
Total operating expenses	65,423	58,309	61,801	58,848	45,195	59,083	57,640	57,418	244,381	219,336	217,989
OPERATING INCOME	98,948	88,731	88,606	91,417	116,505	79,830	84,787	80,537	367,702	361,659	317,865
INTEREST INCOME (EXPENSE)
Interest income	38	42	60	108	49	54	91	113	248	307	169
Interest expense	(392)	(278)	(184)	(142)	(448)	(486)	(276)	(220)	(996)	(1,430)	(1,594)
Total interest income (expense)	(354)	(236)	(124)	(34)	(399)	(432)	(185)	(107)	(748)	(1,123)	(1,425)
INCOME BEFORE INCOME TAXES	98,594	88,495	88,482	91,383	116,106	79,398	84,602	80,430	366,954	360,536	316,440
PROVISION FOR INCOME TAXES	33,903	28,451	29,668	29,139	31,836	25,515	25,254	29,064	121,161	111,669	105,219
NET INCOME	$ 64,691	$ 60,044	$ 58,814	$ 62,244	$ 84,270	$ 53,883	$ 59,348	$ 51,366	$ 245,793	$ 248,867	$ 211,221
Earnings Per Share
Basic earnings per share	$ 0.83	$ 0.77	$ 0.76	$ 0.79	$ 1.07	$ 0.68	$ 0.75	$ 0.64	$ 3.16	$ 3.13	$ 2.60
Basic weighted average shares outstanding	77,602	77,597	77,814	78,413	78,841	78,805	79,473	80,545	77,856	79,416	81,353
Diluted earnings per share	$ 0.83	$ 0.77	$ 0.75	$ 0.79	$ 1.06	$ 0.68	$ 0.74	$ 0.64	$ 3.14	$ 3.12	$ 2.59
Diluted weighted average shares outstanding	78,064	77,932	78,180	78,844	79,261	79,167	79,770	80,735	78,255	79,734	81,601