Tabulation of Business Segment Information Based on Current Segmentation (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Revenue, Major Customer [Line Items]
Total Consolidated Revenues	$ 2,089,781	$ 2,182,371	$ 1,915,181
Amortization Expense	(10,885)	(6,103)	(10,812)
Depreciation and Other	888	1,226	(309)
Operating Income	204,237	494,175	410,902
Interest Income	818	1,539	2,080
Interest Expense	(2,612)	(1,282)	(1,585)
Net Gain on Sale of Assets	3,695
Net Investment Gain			1,225
Net Interest and Other Income (Expense)	1,901	257	1,720
Income Before Income Taxes	206,138	494,432	412,622
Total assets	1,838,616	1,850,503	1,627,826
Total Consolidated additions to Long-lived Assets	415,882	146,025	131,009
Increase in Capital Assets from Acquisitions	47,947	23
Increase in Intangible Assets and Goodwill	238,880	10,276
Depreciation Expense	77,149	58,033	51,225
Intangible Asset Amortization Expense	11,540	6,538	10,997
Business, Technology and Management
Revenue, Major Customer [Line Items]
Total Consolidated Revenues	1,303,556	1,460,146	1,263,553
Operating Income	201,122	359,403	291,060
Total assets	383,064	446,810	406,505
Total Consolidated additions to Long-lived Assets	54,320	55,726	55,458
Depreciation Expense	37,835	26,572	32,814
Medical and Healthcare
Revenue, Major Customer [Line Items]
Total Consolidated Revenues	611,953	558,335	507,037
Operating Income	9,602	106,965	111,081
Total assets	1,029,481	1,036,834	939,854
Total Consolidated additions to Long-lived Assets	268,288	40,590	26,453
Depreciation Expense	22,626	17,025	14,591
Intangible Asset Amortization Expense	6,013	420	4,750
International K-12 and Professional Education
Revenue, Major Customer [Line Items]
Total Consolidated Revenues	174,272	163,890	144,591
Operating Income	3,510	32,684	19,882
Total assets	250,042	238,733	196,813
Total Consolidated additions to Long-lived Assets	64,412	23,844	6,242
Depreciation Expense	6,651	4,066	3,139
Intangible Asset Amortization Expense	4,872	5,683	6,062
Corporate
Revenue, Major Customer [Line Items]
Total assets	176,029	128,126	84,654
Total Consolidated additions to Long-lived Assets	28,862	25,865	42,856
Depreciation Expense	10,037	10,370	681
Capital Expenditures
Revenue, Major Customer [Line Items]
Total Consolidated additions to Long-lived Assets	129,055	135,726	131,009
Reportable Segment
Revenue, Major Customer [Line Items]
Intangible Asset Amortization Expense	$ 10,885	$ 6,103	$ 10,812