INCOME TAXES (Details) (USD $)	3 Months Ended									12 Months Ended
	Sep. 30, 2013	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
Consolidated income from continuing operations before taxes and noncontrolling interest
United States										$ 220,439,000	$ 161,043,000	$ 131,668,000
Foreign										(4,164,000)	3,416,000	11,725,000
Income from continuing operations before income taxes		58,502,000	55,933,000	52,467,000	49,373,000	45,598,000	47,627,000	38,972,000	32,262,000	216,275,000	164,459,000	143,393,000
Current income tax expense from continuing operations
Federal										73,441,000	61,115,000	12,614,000
State										8,623,000	9,085,000	5,585,000
Foreign										4,299,000	2,902,000	3,245,000
Total										86,363,000	73,102,000	21,444,000
Deferred income tax expense from continuing operations
Federal										(5,346,000)	(7,169,000)	23,984,000
State										(509,000)	(1,383,000)	(919,000)
Foreign										(3,934,000)	(1,001,000)	673,000
Total										(9,789,000)	(9,553,000)	23,738,000
Income tax expense		21,229,000	17,527,000	19,389,000	18,429,000	19,295,000	17,713,000	14,688,000	11,853,000	76,574,000	63,549,000	45,182,000
Reconciliation of the Company's effective income tax rate
U.S. federal statutory income tax rate (as a percent)										35.00%	35.00%	35.00%
Change in income tax contingencies (as a percent)										1.40%	2.10%	(2.50%)
State income taxes, net of federal benefit (as a percent)										2.60%	2.80%	2.00%
Foreign earnings subject to U.S. tax (as a percent)										(0.30%)	(0.30%)	2.90%
Change in valuation allowance (as a percent)											(0.60%)	(0.20%)
Tax credits (as a percent)										(2.50%)	(1.20%)	(4.70%)
Domestic production activities deduction (as a percent)										(2.70%)	(2.70%)	(1.50%)
Foreign losses-no future benefit (as a percent)										0.90%	2.00%
Other, net (as a percent)										1.00%	1.50%	0.50%
Effective income tax rate (as a percent)										35.40%	38.60%	31.50%
Deferred tax assets:
Share-based compensation		11,421,000				11,838,000				11,421,000	11,838,000
Deferred revenue, net of deferred costs		15,947,000				14,145,000				15,947,000	14,145,000
Accruals not currently deductible for tax purposes		21,764,000				21,537,000				21,764,000	21,537,000
Inventory		5,250,000				5,518,000				5,250,000	5,518,000
Net operating loss carryforwards		5,949,000				2,988,000				5,949,000	2,988,000
Intangible assets		6,438,000				4,825,000				6,438,000	4,825,000
Allowance for doubtful accounts		2,708,000				4,132,000				2,708,000	4,132,000
Foreign tax credit carryforwards						1,588,000					1,588,000
Other tax credits						969,000					969,000
Interest rate swap agreement		3,515,000				5,043,000				3,515,000	5,043,000
Other		1,571,000				1,176,000				1,571,000	1,176,000
Total gross deferred tax assets		74,563,000				73,759,000				74,563,000	73,759,000
Less: Valuation allowance		(62,000)				(68,000)				(62,000)	(68,000)
Deferred tax assets		74,501,000				73,691,000				74,501,000	73,691,000
Deferred tax liabilities:
Property and equipment		18,322,000				22,955,000				18,322,000	22,955,000
Other		100,000				1,153,000				100,000	1,153,000
Total gross deferred tax liabilities		18,422,000				24,108,000				18,422,000	24,108,000
Net deferred tax assets		56,079,000				49,583,000				56,079,000	49,583,000
Deferred tax liabilities, current		0				21,000				0	21,000
Deferred tax liabilities, noncurrent		170,000				627,000				170,000	627,000
Undistributed earnings from foreign subsidiaries		15,200,000				12,100,000				15,200,000	12,100,000
Net operating loss carryforwards for U.S. federal income tax purposes		4,500,000								4,500,000
Net operating losses in several foreign jurisdictions, total		16,700,000								16,700,000
Valuation allowance for foreign net operating losses		0								0
Increase to stockholder's equity for certain tax benefits realized from employee share-based compensation										20,400,000	6,400,000
Unrecognized tax benefits		15,578,000				12,707,000				15,578,000	12,707,000	8,364,000
Portion of unrecognized tax benefits, if recognized, would impact entity's effective tax rate		15,500,000				12,700,000				15,500,000	12,700,000
Accrued interest and penalties related to unrecognized tax benefit		2,100,000				1,700,000				2,100,000	1,700,000
Increase in accrued interest and penalties during the period related to unrecognized tax benefits										400,000	400,000
Changes to the balance of unrecognized tax benefits
Balance, beginning of year	15,578,000				12,707,000				8,364,000	12,707,000	8,364,000
Additions based on tax provisions related to current year										2,361,000	3,099,000
Additions for tax positions of prior years										578,000	1,461,000
Reductions for tax positions of prior years											(128,000)
Lapse of statute of limitations										(75,000)	(36,000)
Foreign currency translation adjustment										7,000	(53,000)
Balance, end of year		15,578,000				12,707,000				15,578,000	12,707,000	8,364,000
Expected tax refund, relating to federal income tax returns examination for the year 2006 through 2009	7,100,000
Expected reduction to unrecognized tax benefits	8,000,000
Expected reduction to income tax provision	3,600,000
Decrease in unrecognized tax benefits, is reasonably possible, estimated range, maximum		$ 9,500,000								$ 9,500,000