INCOME TAXES (Details) (USD $)	1 Months Ended		3 Months Ended								12 Months Ended
	Oct. 31, 2010	Jan. 31, 2009	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
Consolidated income from continuing operations before taxes and noncontrolling interest
United States											$ 161,043,000	$ 131,668,000	$ 160,265,000
Foreign											3,416,000	11,725,000	10,553,000
Income from continuing operations before income taxes			45,598,000	47,627,000	38,972,000	32,262,000	38,411,000	37,429,000	33,616,000	33,937,000	164,459,000	143,393,000	170,818,000
Current income tax expense from Continuing operations
Federal											61,115,000	12,614,000	59,626,000
State											9,085,000	5,585,000	5,928,000
Foreign											2,902,000	3,245,000	5,057,000
Total											73,102,000	21,444,000	70,611,000
Deferred income tax expense from Continuing operations
Federal											(7,169,000)	23,984,000	(9,261,000)
State											(1,383,000)	(919,000)	(796,000)
Foreign											(1,001,000)	673,000	167,000
Total											(9,553,000)	23,738,000	(9,890,000)
Income tax expense			19,295,000	17,713,000	14,688,000	11,853,000	12,899,000	13,651,000	6,347,000	12,285,000	63,549,000	45,182,000	60,721,000
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)											2.10%	(2.50%)	(0.90%)
State income taxes, net of federal benefit (as a percent)											2.80%	2.00%	2.00%
Foreign earnings subject to U.S. tax (as a percent)											(0.30%)	2.90%	1.20%
Change in valuation allowance (as a percent)											(0.60%)	(0.20%)	(0.30%)
Tax credits (as a percent)											(1.20%)	(4.70%)	(1.70%)
Domestic production activities deduction (as a percent)											(2.70%)	(1.50%)	(0.40%)
Foreign losses-no future benefit (as a percent)											2.00%
Other, net (as a percent)											1.50%	0.50%	0.60%
Effective income tax rate (as a percent)											38.60%	31.50%	35.50%
Deferred tax assets:
Share-based compensation			11,838,000				11,405,000				11,838,000	11,405,000
Deferred revenue, net of deferred costs			14,145,000				9,326,000				14,145,000	9,326,000
Accruals not currently deductible for tax purposes			21,537,000				13,243,000				21,537,000	13,243,000
Inventory			5,518,000				4,640,000				5,518,000	4,640,000
Net operating loss carryforwards			2,988,000				3,466,000				2,988,000	3,466,000
Intangible assets			4,825,000				4,029,000				4,825,000	4,029,000
Allowance for doubtful accounts			4,132,000				4,607,000				4,132,000	4,607,000
Foreign tax credit carryforwards			1,588,000				2,154,000				1,588,000	2,154,000
Other tax credits			969,000				2,086,000				969,000	2,086,000
Interest rate swap agreement			5,043,000				1,412,000				5,043,000	1,412,000
Other			1,176,000				426,000				1,176,000	426,000
Total gross deferred tax assets			73,759,000				56,794,000				73,759,000	56,794,000
Less: Valuation allowance			(68,000)				(1,186,000)				(68,000)	(1,186,000)
Deferred tax assets			73,691,000				55,608,000				73,691,000	55,608,000
Deferred tax liabilities:
Property and equipment			22,955,000				12,734,000				22,955,000	12,734,000
Other			1,153,000				2,293,000				1,153,000	2,293,000
Total gross deferred tax liabilities			24,108,000				15,027,000				24,108,000	15,027,000
Net deferred tax assets			49,583,000				40,581,000				49,583,000	40,581,000
Deferred tax liabilities, current			21,000				439,000				21,000	439,000
Deferred tax liabilities, noncurrent			627,000				418,000				627,000	418,000
Undistributed earnings from foreign subsidiaries			12,100,000				9,700,000				12,100,000	9,700,000
Net operating loss carryforwards for U.S. federal income tax purposes			5,100,000								5,100,000
Net operating losses in several foreign jurisdictions, total			4,300,000								4,300,000
Increase to stockholder's equity for certain tax benefits realized from employee share-based compensation											6,400,000	8,700,000
Unrecognized tax benefits			12,707,000				8,364,000				12,707,000	8,364,000	11,637,000
Portion of unrecognized tax benefits, if recognized, would impact entity's effective tax rate			12,700,000				8,200,000				12,700,000	8,200,000
Accrued interest and penalties related to unrecognized tax benefit			1,700,000				1,300,000				1,700,000	1,300,000
Increase (decrease) in accrued interest and penalties during the period related to unrecognized tax benefits											400,000	(2,500,000)
Changes to the balance of unrecognized tax benefits
Balance, beginning of year						8,364,000				11,637,000	8,364,000	11,637,000
Additions based on tax provisions related to current year											3,099,000	1,035,000
Additions for tax positions of prior years											1,461,000	2,812,000
Reductions for tax positions of prior years											(128,000)	(6,687,000)
Lapse of statute of limitations											(36,000)	(541,000)
Foreign currency translation adjustment											(53,000)	108,000
Balance, end of year			12,707,000				8,364,000				12,707,000	8,364,000	11,637,000
Tax paid, excluding interest, relating to federal income tax returns examination for the year 2003 through 2005		3,400,000
Interest paid / (refund received) relating to federal income tax returns examination for the year 2003 through 2005	(600,000)	1,200,000
Tax refund received, including interest, relating to federal income tax returns examination for the year 2003 through 2005	(2,300,000)
If successful in defending the Company's position, reduction to unrecognized tax benefits											3,700,000
If the IRS were to prevail in full, additional income tax provision											7,100,000
Decrease in unrecognized tax benefits, is reasonably possible, estimated range, maximum			$ 1,300,000								$ 1,300,000