Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 52,529	$ 42,606	$ 48,360	$ 43,220	$ 53,248	$ 42,500	$ 35,902	$ 35,960	$ 186,715	$ 167,610	$ 152,040
Adjustments to reconcile net income to net cash from operating activities:
Depreciation									52,935	51,967	45,322
Amortization									54,836	48,374	49,297
Change in deferred income taxes									12,752	18,336	20,911
Excess tax benefits from stock-based compensation, Operating Activities									(3,406)	(3,621)	(3,465)
Expense for stock-based compensation									10,091	8,615	6,950
Gain/loss on disposal of assets									(784)	3,908	1,198
Changes in operating assets and liabilities:
Change in receivables									7,498	(12,739)	(10,795)
Change in prepaid expenses, deferred costs and other									(28,565)	(11,502)	(27,761)
Change in accounts payable									(1,252)	(4,582)	3,488
Change in accrued expenses									(6,364)	7,774	7,770
Change in income taxes									5,251	4,575	9,257
Change in deferred revenues									51,952	30,459	10,338
Net cash from operating activities									341,659	309,174	264,550
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for acquisitions, net of cash acquired									(27,894)	0	0
Capital expenditures									(33,185)	(46,256)	(41,441)
Proceeds from sale of assets									7,781	530	2,772
Customer contracts acquired									0	(186)	(720)
Internal use software									(16,288)	0	0
Computer software developed									(62,194)	(51,332)	(37,873)
Proceeds from investments									0	0	3,000
Purchase of investments									0	0	(2,000)
Net cash from investing activities									(131,780)	(97,244)	(76,262)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on credit facilities									25,000	0	0
Repayments on credit facilities									(47,158)	(145,180)	(35,280)
Purchase of treasury stock									(175,699)	(58,126)	(34,371)
Dividends paid									(71,251)	(48,202)	(38,128)
Excess tax benefits from stock-based compensation, Financing Activities									3,406	3,621	3,465
Proceeds from issuance of common stock upon exercise of stock options									609	6,775	11,004
Minimum tax withholding payments related to option exercises									(6,598)	(3,926)	(4,112)
Proceeds from sale of common stock, net									4,284	3,700	3,322
Net cash from financing activities									(267,407)	(241,338)	(94,100)
NET CHANGE IN CASH AND CASH EQUIVALENTS									(57,528)	(29,408)	94,188
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD				127,905				157,313	127,905	157,313	63,125
CASH AND CASH EQUIVALENTS, END OF PERIOD	70,377				127,905				70,377	127,905	157,313
Scenario, Previously Reported [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	50,609	46,757	53,982	49,788	47,669	45,996	40,505	42,475	201,136	176,645	154,984
Adjustments to reconcile net income to net cash from operating activities:
Depreciation									52,935	51,967	45,322
Amortization									54,836	48,374	49,297
Change in deferred income taxes									22,032	24,091	22,610
Excess tax benefits from stock-based compensation, Operating Activities									(3,406)	(3,621)	(3,465)
Expense for stock-based compensation									10,091	8,615	6,950
Gain/loss on disposal of assets									(784)	3,908	1,198
Changes in operating assets and liabilities:
Change in receivables									7,498	(12,739)	(10,795)
Change in prepaid expenses, deferred costs and other									(15,386)	(4,430)	(22,962)
Change in accounts payable									(1,252)	(4,582)	3,488
Change in accrued expenses									(6,364)	7,774	7,770
Change in income taxes									5,251	4,575	9,257
Change in deferred revenues									15,072	8,597	896
Net cash from operating activities									341,659	309,174	264,550
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for acquisitions, net of cash acquired									(27,894)	0	0
Capital expenditures									(33,185)	(46,256)	(41,441)
Proceeds from sale of assets									7,781	530	2,772
Customer contracts acquired									0	(186)	(720)
Internal use software									(16,288)	0	0
Computer software developed									(62,194)	(51,332)	(37,873)
Proceeds from investments									0	0	3,000
Purchase of investments									0	0	(2,000)
Net cash from investing activities									(131,780)	(97,244)	(76,262)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on credit facilities									25,000	0	0
Repayments on credit facilities									(47,158)	(145,180)	(35,280)
Purchase of treasury stock									(175,699)	(58,126)	(34,371)
Dividends paid									(71,251)	(48,202)	(38,128)
Excess tax benefits from stock-based compensation, Financing Activities									3,406	3,621	3,465
Proceeds from issuance of common stock upon exercise of stock options									609	6,775	11,004
Minimum tax withholding payments related to option exercises									(6,598)	(3,926)	(4,112)
Proceeds from sale of common stock, net									4,284	3,700	3,322
Net cash from financing activities									(267,407)	(241,338)	(94,100)
NET CHANGE IN CASH AND CASH EQUIVALENTS									(57,528)	(29,408)	94,188
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD				127,905				157,313	127,905	157,313	63,125
CASH AND CASH EQUIVALENTS, END OF PERIOD	70,377				127,905				70,377	127,905	157,313
Scenario, Adjustment [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	1,920	$ (4,151)	$ (5,622)	(6,568)	5,579	$ (3,496)	$ (4,603)	(6,515)	(14,421)	(9,035)	(2,944)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation									0	0	0
Amortization									0	0	0
Change in deferred income taxes									(9,280)	(5,755)	(1,699)
Excess tax benefits from stock-based compensation, Operating Activities									0	0	0
Expense for stock-based compensation									0	0	0
Gain/loss on disposal of assets									0	0	0
Changes in operating assets and liabilities:
Change in receivables									0	0	0
Change in prepaid expenses, deferred costs and other									(13,179)	(7,072)	(4,799)
Change in accounts payable									0	0	0
Change in accrued expenses									0	0	0
Change in income taxes									0	0	0
Change in deferred revenues									36,880	21,862	9,442
Net cash from operating activities									0	0	0
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for acquisitions, net of cash acquired									0	0	0
Capital expenditures									0	0	0
Proceeds from sale of assets									0	0	0
Customer contracts acquired									0	0	0
Internal use software									0	0	0
Computer software developed									0	0	0
Proceeds from investments									0	0	0
Purchase of investments									0	0	0
Net cash from investing activities									0	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on credit facilities									0	0	0
Repayments on credit facilities									0	0	0
Purchase of treasury stock									0	0	0
Dividends paid									0	0	0
Excess tax benefits from stock-based compensation, Financing Activities									0	0	0
Proceeds from issuance of common stock upon exercise of stock options									0	0	0
Minimum tax withholding payments related to option exercises									0	0	0
Proceeds from sale of common stock, net									0	0	0
Net cash from financing activities									0	0	0
NET CHANGE IN CASH AND CASH EQUIVALENTS									0	0	0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD				$ 0				$ 0	0	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 0				$ 0				$ 0	$ 0	$ 0