SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Impact on Consolidated Balance Sheet Upon Adoption of ASC 842) (Detail) - USD ($) $ / shares in Units, $ in Thousands	Sep. 30, 2019	Jul. 01, 2019	Jun. 30, 2019	Sep. 30, 2018	Jun. 30, 2018
Current Assets:
Cash and Cash Equivalents	$ 121,079		$ 204,202	$ 334,222
Investments in Marketable Securities	8,763		8,680	8,402
Restricted Cash	710		1,022	877
Accounts Receivable, Net	116,212		83,560	108,213
Prepaid Expenses and Other Current Assets	39,476		29,313	60,031
Total Current Assets	456,113		504,700	739,386
Land, Building and Equipment:
Land	41,441		41,938	41,183
Building	309,893		322,657	288,438
Equipment	235,027		228,533	221,294
Construction in Progress	8,681		13,545	25,799
Land, Building and Equipment, Gross	595,042		606,673	576,714
Accumulated Depreciation	(314,219)		(323,240)	(306,340)
Noncurrent Assets:
Operating Lease Assets	195,238		0	0
Deferred Income Taxes	14,977		18,314	31,080
Intangible Assets, Net	295,324		297,989	240,166
Goodwill	686,992		687,256	627,239
Other Assets, Net	91,086		52,113	45,201
Total Noncurrent Assets	1,649,625		1,373,313	1,259,076
TOTAL ASSETS	2,460,324		2,242,696	2,349,865
Current Liabilities:
Accounts Payable	44,674		53,385	48,087
Accrued Salaries, Wages and Benefits	30,071		46,664	32,056
Accrued Liabilities	61,966		76,529	80,591
Deferred Revenue	168,533		95,944	173,856
Current Operating Lease Liabilities	54,057		0	0
Current Portion of Long-Term Debt	3,000		3,000	3,000
Total Current Liabilities	412,475		311,631	459,086
Noncurrent Liabilities:
Long-Term Debt	327,600		398,094	289,579
Long-Term Operating Lease Liabilities	192,055		0	0
Deferred Income Taxes	29,094		29,426	29,378
Other Liabilities	92,252		86,326	101,561
Total Noncurrent Liabilities	717,469		529,992	441,930
TOTAL LIABILITIES	1,129,944		841,623	901,016
NONCONTROLLING INTEREST	3,187		9,543	8,814	$ 9,110
SHAREHOLDERS' EQUITY:
Common Stock, $0.01 Par Value	805		801	798
Additional Paid-in Capital	492,151		486,061	469,545
Retained Earnings	2,027,263		2,012,902	1,908,465
Accumulated Other Comprehensive Loss	(176,739)		(137,290)	(163,168)
Treasury Stock, at Cost	(1,016,287)		(970,944)	(775,605)
TOTAL SHAREHOLDERS' EQUITY	1,327,193		1,391,530	1,440,035	$ 1,519,286
TOTAL LIABILITIES, NONCONTROLLING INTEREST AND SHAREHOLDERS' EQUITY	$ 2,460,324		$ 2,242,696	$ 2,349,865
Common Stock, Par Value	$ 0.01		$ 0.01	$ 0.01
ASC 842
Current Assets:
Cash and Cash Equivalents		$ 299,445
Investments in Marketable Securities		8,680
Restricted Cash		1,022
Accounts Receivable, Net		157,829
Prepaid Expenses and Other Current Assets		34,241
Total Current Assets		501,217
Land, Building and Equipment:
Land		44,609
Building		383,331
Equipment		281,551
Construction in Progress		16,222
Land, Building and Equipment, Gross		725,713
Accumulated Depreciation		(361,030)
Land, Building and Equipment, Net		364,683
Noncurrent Assets:
Operating Lease Assets		282,978
Deferred Income Taxes		18,314
Intangible Assets, Net		418,097
Goodwill		874,451
Other Assets, Net		62,451
Total Noncurrent Assets		1,656,291
TOTAL ASSETS		2,522,191
Current Liabilities:
Accounts Payable		57,627
Accrued Salaries, Wages and Benefits		64,492
Accrued Liabilities		69,776
Deferred Revenue		99,790
Current Operating Lease Liabilities		66,707
Current Portion of Long-Term Debt		3,000
Total Current Liabilities		361,392
Noncurrent Liabilities:
Long-Term Debt		398,094
Long-Term Operating Lease Liabilities		269,387
Deferred Income Taxes		29,426
Other Liabilities		62,819
Total Noncurrent Liabilities		759,726
TOTAL LIABILITIES		1,121,118
NONCONTROLLING INTEREST		9,543
SHAREHOLDERS' EQUITY:
Common Stock, $0.01 Par Value		801
Additional Paid-in Capital		486,061
Retained Earnings		2,012,902
Accumulated Other Comprehensive Loss		(137,290)
Treasury Stock, at Cost		(970,944)
TOTAL SHAREHOLDERS' EQUITY		1,391,530
TOTAL LIABILITIES, NONCONTROLLING INTEREST AND SHAREHOLDERS' EQUITY		2,522,191
ASC 842 | June 30, 2019
Current Assets:
Cash and Cash Equivalents			$ 299,445
Investments in Marketable Securities			8,680
Restricted Cash			1,022
Accounts Receivable, Net			157,829
Prepaid Expenses and Other Current Assets			37,724
Total Current Assets			504,700
Land, Building and Equipment:
Land			44,609
Building			383,331
Equipment			281,551
Construction in Progress			16,222
Land, Building and Equipment, Gross			725,713
Accumulated Depreciation			(361,030)
Land, Building and Equipment, Net			364,683
Noncurrent Assets:
Deferred Income Taxes			18,314
Intangible Assets, Net			418,097
Goodwill			874,451
Other Assets, Net			62,451
Total Noncurrent Assets			1,373,313
TOTAL ASSETS			2,242,696
Current Liabilities:
Accounts Payable			57,627
Accrued Salaries, Wages and Benefits			64,492
Accrued Liabilities			86,722
Deferred Revenue			99,790
Current Portion of Long-Term Debt			3,000
Total Current Liabilities			311,631
Noncurrent Liabilities:
Long-Term Debt			398,094
Deferred Income Taxes			29,426
Other Liabilities			102,472
Total Noncurrent Liabilities			529,992
TOTAL LIABILITIES			841,623
NONCONTROLLING INTEREST			9,543
SHAREHOLDERS' EQUITY:
Common Stock, $0.01 Par Value			801
Additional Paid-in Capital			486,061
Retained Earnings			2,012,902
Accumulated Other Comprehensive Loss			(137,290)
Treasury Stock, at Cost			(970,944)
TOTAL SHAREHOLDERS' EQUITY			1,391,530
TOTAL LIABILITIES, NONCONTROLLING INTEREST AND SHAREHOLDERS' EQUITY			$ 2,242,696
ASC 842 | Adjustments due to adoption of ASC 842
Current Assets:
Prepaid Expenses and Other Current Assets		(3,483)
Total Current Assets		(3,483)
Noncurrent Assets:
Operating Lease Assets		282,978
Total Noncurrent Assets		282,978
TOTAL ASSETS		279,495
Current Liabilities:
Accrued Liabilities		(16,946)
Current Operating Lease Liabilities		66,707
Total Current Liabilities		49,761
Noncurrent Liabilities:
Long-Term Operating Lease Liabilities		269,387
Other Liabilities		(39,653)
Total Noncurrent Liabilities		229,734
TOTAL LIABILITIES		279,495
SHAREHOLDERS' EQUITY:
TOTAL LIABILITIES, NONCONTROLLING INTEREST AND SHAREHOLDERS' EQUITY		279,495
ASC 842 | Adjustments due to adoption of ASC 842 | Accrued Liabilities [Member]
SHAREHOLDERS' EQUITY:
Deferred Rent Credit, Current		6,800
Restructuring Reserve, Current		10,100
ASC 842 | Adjustments due to adoption of ASC 842 | Prepaid Expenses and Other Current Assets [Member]
SHAREHOLDERS' EQUITY:
Prepaid Rent		3,500
ASC 842 | Adjustments due to adoption of ASC 842 | Other Noncurrent Liabilities [Member]
SHAREHOLDERS' EQUITY:
Noncurrent deferred rent liability		24,800
Restructuring Reserve, Noncurrent		$ 14,900