Total Stock-Based Compensation Expense Included in Consolidated Statement of Earnings (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-Based Compensation Expense	$ 5,816	$ 5,716
Income Tax Benefit	(1,946)	(1,854)
Net Stock-Based Compensation Expense	3,870	3,862
Cost Of Educational Services
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-Based Compensation Expense	1,861	1,829
Student Services And Administrative Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-Based Compensation Expense	$ 3,955	$ 3,887