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STOCK PLANS AND STOCK-BASED COMPENSATION - Components of Stock-Based Compensation Expense and Related Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Stock-based compensation included in indirect costs and selling expense:      
Restricted stock and RSU expense $ 25,272 $ 23,628 $ 21,945
Income tax benefit recognized for stock-based compensation $ 4,865 $ 7,769 $ 7,498