Nature of Operations and Summary of Significant Accounting Policies Impact of Adoption of ASC 606 on Previously Reported Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 271,885	$ 365,034	$ 229,561
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	47,378	47,975	49,677
Amortization	113,255	104,011	90,109
Change in deferred income taxes	7,604	(74,884)	21,187
Expense for stock-based compensation	12,589	11,758	11,129
(Gain)/loss on disposal of assets and businesses	161	(954)	4,771
Changes in operating assets and liabilities:
Change in receivables	(11,777)	21,489	(33,096)
Change in prepaid expenses, deferred costs and other	(62,165)	(82,663)	(24,992)
Change in accounts payable	(7,526)	6,922	(7,812)
Change in accrued expenses	31,889	7,091	(11,966)
Change in income taxes	4,179	5,108	(6,444)
Change in deferred revenues	23,656	1,255	35,198
Net cash from operating activities	431,128	412,142	357,322
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for acquisitions, net of cash acquired	(19,981)	(137,562)	0
Capital expenditures	(53,598)	(40,135)	(41,947)
Proceeds from the sale of businesses	0	350	5,632
Proceeds from the sale of assets	127	306	968
Purchased software	(6,049)	(13,138)	(16,608)
Computer software developed	(111,114)	(96,647)	(89,631)
Purchase of investments	0	(5,000)	0
Net cash from investing activities	(190,635)	(291,826)	(141,586)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on credit facilities	35,000	125,000	80,000
Repayments on credit facilities	(35,000)	(175,000)	(30,200)
Purchase of treasury stock	(54,864)	(48,986)	(130,140)
Dividends paid	(118,745)	(105,021)	(91,707)
Proceeds from issuance of common stock upon exercise of stock options	237	176	1
Tax withholding payments related to share based compensation	(13,973)	(7,333)	(5,480)
Proceeds from sale of common stock	9,040	7,523	6,245
Net cash from financing activities	(178,305)	(203,641)	(171,281)
NET CHANGE IN CASH AND CASH EQUIVALENTS	62,188	(83,325)	44,455
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	31,440	114,765	70,310
CASH AND CASH EQUIVALENTS, END OF PERIOD	93,628	31,440	114,765
Previously Reported [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income		376,660	245,793
Adjustments to reconcile net income to net cash from operating activities:
Depreciation		47,975	49,677
Amortization		104,011	90,109
Change in deferred income taxes		(51,644)	30,940
Expense for stock-based compensation		11,758	11,129
(Gain)/loss on disposal of assets and businesses		(954)	4,771
Changes in operating assets and liabilities:
Change in receivables		(9,219)	(22,499)
Change in prepaid expenses, deferred costs and other		(24,304)	(25,088)
Change in accounts payable		6,922	(7,812)
Change in accrued expenses		9,091	(4,454)
Change in income taxes		5,108	(6,444)
Change in deferred revenues		(63,262)	(8,800)
Net cash from operating activities		412,142	357,322
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for acquisitions, net of cash acquired		(137,562)	0
Capital expenditures		(40,135)	(41,947)
Proceeds from the sale of businesses		350	5,632
Proceeds from the sale of assets		306	968
Purchased software		(13,138)	(16,608)
Computer software developed		(96,647)	(89,631)
Purchase of investments		(5,000)	0
Net cash from investing activities		(291,826)	(141,586)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on credit facilities		125,000	80,000
Repayments on credit facilities		(175,000)	(30,200)
Purchase of treasury stock		(48,986)	(130,140)
Dividends paid		(105,021)	(91,707)
Proceeds from issuance of common stock upon exercise of stock options		176	1
Tax withholding payments related to share based compensation		(7,333)	(5,480)
Proceeds from sale of common stock		7,523	6,245
Net cash from financing activities		(203,641)	(171,281)
NET CHANGE IN CASH AND CASH EQUIVALENTS		(83,325)	44,455
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	31,440	114,765	70,310
CASH AND CASH EQUIVALENTS, END OF PERIOD		31,440	114,765
Accounting Standards Update 2014-09 [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income		(11,626)	(16,232)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation		0	0
Amortization		0	0
Change in deferred income taxes		(23,240)	(9,753)
Expense for stock-based compensation		0	0
(Gain)/loss on disposal of assets and businesses		0	0
Changes in operating assets and liabilities:
Change in receivables		30,708	(10,597)
Change in prepaid expenses, deferred costs and other		(58,359)	96
Change in accounts payable		0	0
Change in accrued expenses		(2,000)	(7,512)
Change in income taxes		0	0
Change in deferred revenues		64,517	43,998
Net cash from operating activities		0	0
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for acquisitions, net of cash acquired		0	0
Capital expenditures		0	0
Proceeds from the sale of businesses		0	0
Proceeds from the sale of assets		0	0
Purchased software		0	0
Computer software developed		0	0
Purchase of investments		0	0
Net cash from investing activities		0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings on credit facilities		0	0
Repayments on credit facilities		0	0
Purchase of treasury stock		0	0
Dividends paid		0	0
Proceeds from issuance of common stock upon exercise of stock options		0	0
Tax withholding payments related to share based compensation		0	0
Proceeds from sale of common stock		0	0
Net cash from financing activities		0	0
NET CHANGE IN CASH AND CASH EQUIVALENTS		0	0
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	$ 0	0	0
CASH AND CASH EQUIVALENTS, END OF PERIOD		$ 0	$ 0