Quarterly Financial Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
REVENUE
License	$ 13,986	$ 15,009	$ 13,552	$ 12,264	$ 15,123	$ 13,025	$ 15,460	$ 9,459	$ 54,811	$ 53,067	$ 52,225
Support and service	236,762	226,535	225,609	220,270	219,191	210,074	212,378	210,610	909,176	852,253	720,504
Hardware	15,861	14,760	16,697	15,804	14,941	17,086	14,797	14,753	63,122	61,577	63,857
Total revenue	266,609	256,304	255,858	248,338	249,255	240,185	242,635	234,822	1,027,109	966,897	836,586
COST OF SALES
Cost of license	1,445	2,424	1,115	1,127	1,883	1,145	2,079	1,178	6,111	6,285	5,827
Cost of support and service	144,735	139,593	135,833	131,124	132,244	131,010	126,857	125,806	551,285	515,917	438,476
Cost of hardware	11,917	10,904	11,501	11,661	10,936	12,740	10,880	10,805	45,983	45,361	47,163
Total cost of sales	158,097	152,921	148,449	143,912	145,063	144,895	139,816	137,789	603,379	567,563	491,466
GROSS PROFIT	108,512	103,383	107,409	104,426	104,192	95,290	102,819	97,033	423,730	399,334	345,120
OPERATING EXPENSES
Selling and marketing	20,588	18,994	18,164	18,754	17,791	16,929	16,979	16,362	76,500	68,061	60,875
Research and development	15,394	15,471	15,075	14,936	16,452	15,716	15,837	15,390	60,876	63,395	50,820
General and administrative	11,377	12,421	13,382	12,939	11,899	12,142	15,014	12,506	50,119	51,561	51,172
Total operating expenses	47,359	46,886	46,621	46,629	46,142	44,787	47,830	44,258	187,495	183,017	162,867
OPERATING INCOME	61,153	56,497	60,788	57,797	58,050	50,503	54,989	52,775	236,235	216,317	182,253
INTEREST INCOME (EXPENSE)
Interest income	856	85	106	129	15	61	32	17	1,176	125	161
Interest expense	(1,375)	(1,464)	(1,448)	(1,456)	(1,841)	(1,710)	(2,487)	(2,892)	(5,743)	(8,930)	(1,618)
Total interest income (expense)	(519)	(1,379)	(1,342)	(1,327)	(1,826)	(1,649)	(2,455)	(2,875)	(4,567)	(8,805)	(1,457)
INCOME BEFORE INCOME TAXES	60,634	55,118	59,446	56,470	56,224	48,854	52,534	49,900	231,668	207,512	180,796
PROVISION FOR INCOME TAXES	17,307	18,461	20,921	19,995	19,650	15,773	16,489	18,129	76,684	70,041	62,926
Net Income	43,327	36,657	38,525	36,475	36,574	33,081	36,045	31,771	154,984	137,471	117,870
Diluted earnings per share	$ 0.50	$ 0.42	$ 0.44	$ 0.42	$ 0.42	$ 0.38	$ 0.42	$ 0.37	$ 1.78	$ 1.59	$ 1.38
Diluted weighted average shares outstanding	87,051	87,592	87,371	87,134	87,090	86,972	86,523	86,147	87,287	86,687	85,381
Basic earnings per share	$ 0.50	$ 0.42	$ 0.45	$ 0.42	$ 0.42	$ 0.38	$ 0.42	$ 0.37	$ 1.79	$ 1.60	$ 1.39
Basic weighted average shares outstanding	86,595	86,824	86,572	86,403	86,335	86,218	85,770	85,469	86,599	85,948	84,558
Banking Systems and Services
REVENUE
License									37,200	37,424	38,117
Support and service									696,204	665,297	585,470
Hardware									45,051	44,171	48,695
Total revenue									778,455	746,892	672,282
COST OF SALES
Cost of license									4,863	5,008	4,732
Cost of support and service									419,954	394,040	348,489
Cost of hardware									32,123	31,850	35,961
Total cost of sales									456,940	430,898	389,182
GROSS PROFIT									321,515	315,994	283,100
Credit Union Systems and Services
REVENUE
License									17,611	15,643	14,108
Support and service									212,972	186,956	135,034
Hardware									18,071	17,406	15,162
Total revenue									248,654	220,005	164,304
COST OF SALES
Cost of license									1,248	1,277	1,095
Cost of support and service									131,331	121,877	89,987
Cost of hardware									13,860	13,511	11,202
Total cost of sales									146,439	136,665	102,284
GROSS PROFIT									$ 102,215	$ 83,340	$ 62,020