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STOCK-BASED COMPENSATION (Total Stock-Based Compensation Expense Included in Consolidated Statement of Income) (Detail) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-Based Compensation Expense $ 4,137 $ 4,985
Income Tax Benefit (2,007) (2,434)
Net Stock-Based Compensation Expense 2,130 2,551
Cost of Educational Services    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-Based Compensation Expense 395 1,420
Student Services And Administrative Expense    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-Based Compensation Expense 3,742 3,017
Restructuring Expense    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock-Based Compensation Expense $ 0 $ 548