Quarterly Financial Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
REVENUE
License	$ 12,063	$ 16,681	$ 13,210	$ 12,864	$ 13,986	$ 15,009	$ 13,552	$ 12,264	$ 54,818	$ 54,811	$ 53,067
Support and service	269,901	250,415	250,310	244,585	236,762	226,535	225,609	220,270	1,015,211	909,176	852,253
Hardware	16,184	14,447	15,174	13,552	15,861	14,760	16,697	15,804	59,357	63,122	61,577
Total revenue	298,148	281,543	278,694	271,001	266,609	256,304	255,858	248,338	1,129,386	1,027,109	966,897
COST OF SALES
Cost of license	1,136	1,360	1,251	1,077	1,445	2,424	1,115	1,127	4,824	6,111	6,285
Cost of support and service	160,807	155,012	144,683	143,418	144,735	139,593	135,833	131,124	603,920	551,285	515,917
Cost of hardware	11,968	10,581	10,523	10,578	11,917	10,904	11,501	11,661	43,650	45,983	45,361
Total cost of sales	173,911	166,953	156,457	155,073	158,097	152,921	148,449	143,912	652,394	603,379	567,563
GROSS PROFIT	124,237	114,590	122,237	115,928	108,512	103,383	107,409	104,426	476,992	423,730	399,334
OPERATING EXPENSES
Selling and marketing	20,558	20,935	19,937	20,189	20,588	18,994	18,164	18,754	81,619	76,500	68,061
Research and development	16,870	15,996	15,691	14,645	15,394	15,471	15,075	14,936	63,202	60,876	63,395
General and administrative	13,915	11,950	27,181	13,578	11,377	12,421	13,382	12,939	66,624	50,119	51,561
Total operating expenses	51,343	48,881	62,809	48,412	47,359	46,886	46,621	46,629	211,445	187,495	183,017
OPERATING INCOME	72,894	65,709	59,428	67,516	61,153	56,497	60,788	57,797	265,547	236,235	216,317
INTEREST INCOME (EXPENSE)
Interest income	130	133	190	187	856	85	106	129	640	1,176	125
Interest expense	(2,701)	(1,034)	(1,261)	(1,341)	(1,375)	(1,464)	(1,448)	(1,456)	(6,337)	(5,743)	(8,930)
Total interest income (expense)	(2,571)	(901)	(1,071)	(1,154)	(519)	(1,379)	(1,342)	(1,327)	(5,697)	(4,567)	(8,805)
INCOME BEFORE INCOME TAXES	70,323	64,808	58,357	66,362	60,634	55,118	59,446	56,470	259,850	231,668	207,512
PROVISION FOR INCOME TAXES	22,654	18,812	17,852	23,887	17,307	18,461	20,921	19,995	83,205	76,684	70,041
Net Income	47,669	45,996	40,505	42,475	43,327	36,657	38,525	36,475	176,645	154,984	137,471
Diluted earnings per share	$ 0.55	$ 0.53	$ 0.47	$ 0.49	$ 0.50	$ 0.42	$ 0.44	$ 0.42	$ 2.04	$ 1.78	$ 1.59
Diluted weighted average shares outstanding	86,525	86,705	86,639	86,605	87,051	87,592	87,371	87,134	86,619	87,287	86,687
Basic earnings per share	$ 0.56	$ 0.53	$ 0.47	$ 0.49	$ 0.50	$ 0.42	$ 0.45	$ 0.42	$ 2.05	$ 1.79	$ 1.60
Basic weighted average shares outstanding	85,845	86,120	86,084	86,109	86,595	86,824	86,572	86,403	86,040	86,599	85,948
Banking Systems and Services
REVENUE
License									32,933	37,200	37,424
Support and service									774,073	696,204	665,297
Hardware									41,052	45,051	44,171
Total revenue									848,058	778,455	746,892
COST OF SALES
Cost of license									3,699	4,863	5,008
Cost of support and service									460,050	419,954	394,040
Cost of hardware									29,936	32,123	31,850
Total cost of sales									493,685	456,940	430,898
GROSS PROFIT									354,373	321,515	315,994
Credit Union Systems and Services
REVENUE
License									21,885	17,611	15,643
Support and service									241,138	212,972	186,956
Hardware									18,305	18,071	17,406
Total revenue									281,328	248,654	220,005
COST OF SALES
Cost of license									1,125	1,248	1,277
Cost of support and service									143,870	131,331	121,877
Cost of hardware									13,714	13,860	13,511
Total cost of sales									158,709	146,439	136,665
GROSS PROFIT									$ 122,619	$ 102,215	$ 83,340