SEGMENT INFORMATION (Tabulation of Business Segment Information Based on Current Segmentation) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014
Revenue, Major Customer [Line Items]
Total Consolidated Revenue	$ 489,830us-gaap_SalesRevenueNet	$ 496,117us-gaap_SalesRevenueNet	$ 1,436,754us-gaap_SalesRevenueNet	$ 1,438,298us-gaap_SalesRevenueNet
Total Consolidated Operating Income	49,450us-gaap_OperatingIncomeLoss	69,537us-gaap_OperatingIncomeLoss	123,063us-gaap_OperatingIncomeLoss	138,370us-gaap_OperatingIncomeLoss
Interest Income	1,318us-gaap_InvestmentIncomeInterest	605us-gaap_InvestmentIncomeInterest	2,015us-gaap_InvestmentIncomeInterest	1,498us-gaap_InvestmentIncomeInterest
Interest Expense	(2,813)us-gaap_InterestExpenseDebt	(1,073)us-gaap_InterestExpenseDebt	(3,558)us-gaap_InterestExpenseDebt	(3,125)us-gaap_InterestExpenseDebt
Net Interest and Other Income (Expense)	(1,495)dv_NetInterestAndOtherExpenseIncome	(468)dv_NetInterestAndOtherExpenseIncome	(1,543)dv_NetInterestAndOtherExpenseIncome	(1,627)dv_NetInterestAndOtherExpenseIncome
Total Consolidated Income from Continuing Operations Before Income Taxes	47,955	69,069	121,520	136,743
Total Consolidated Assets	2,148,677us-gaap_Assets	2,048,865us-gaap_Assets	2,148,677us-gaap_Assets	2,048,865us-gaap_Assets	1,997,636us-gaap_Assets
Total Consolidated Additions to Long-lived Assets	142,453	14,183	201,352	75,606
Capital Expenditures	21,240	14,183	64,301	47,609
Increase in Capital Assets from Acquisitions	9,416	0	10,921	2,037
Increase in Intangible Assets and Goodwill	111,797	0	126,130	25,960
Total Increase in Consolidated Long-lived Assets	142,453	14,183	201,352	75,606
Total Consolidated Depreciation	20,765us-gaap_Depreciation	20,822us-gaap_Depreciation	62,126us-gaap_Depreciation	61,541us-gaap_Depreciation
Total Consolidated Amortization	1,242us-gaap_AmortizationOfIntangibleAssets	1,594us-gaap_AmortizationOfIntangibleAssets	3,818us-gaap_AmortizationOfIntangibleAssets	5,349us-gaap_AmortizationOfIntangibleAssets
Medical and Healthcare
Revenue, Major Customer [Line Items]
Total Consolidated Revenue	225,427	204,610	645,424	570,913
Total Consolidated Operating Income	43,302	44,703	117,807	103,687
Total Consolidated Assets	1,126,681	1,110,784	1,126,681	1,110,784
Total Consolidated Additions to Long-lived Assets	14,366	8,559	44,642	27,487
Total Consolidated Depreciation	6,437	5,786	19,468	18,407
Total Consolidated Amortization	162	901	485	2,745
International and Professional Education
Revenue, Major Customer [Line Items]
Total Consolidated Revenue	61,112	50,782	175,539	155,933
Total Consolidated Operating Income	4,629	6,330	19,859	22,401
Total Consolidated Assets	398,399	296,915	398,399	296,915
Total Consolidated Additions to Long-lived Assets	122,926	2,705	145,137	34,246
Total Consolidated Depreciation	1,579	1,389	4,532	2,503
Total Consolidated Amortization	1,080	693	2,050	2,110
Business, Technology and Management
Revenue, Major Customer [Line Items]
Total Consolidated Revenue	203,832	241,896	617,810	714,118
Total Consolidated Operating Income	1,146	22,517	(9,155)	21,403
Total Consolidated Assets	443,234	495,711	443,234	495,711
Total Consolidated Additions to Long-lived Assets	965	2,497	4,154	10,351
Total Consolidated Depreciation	9,290	11,072	28,171	32,983
Intersegment Revenue and Other
Revenue, Major Customer [Line Items]
Total Consolidated Revenue	(541)	(1,171)	(2,019)	(2,666)
Home Office And Other
Revenue, Major Customer [Line Items]
Total Consolidated Operating Income	373	(4,013)	(5,448)	(9,121)
Total Consolidated Assets	180,363	145,455	180,363	145,455
Total Consolidated Additions to Long-lived Assets	4,196	422	7,419	3,522
Total Consolidated Depreciation	$ 3,459	$ 2,575	$ 9,955	$ 7,648

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Increase in intangible assets and goodwill.

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Net interest and other (expense) income.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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