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STOCK PLANS AND STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Jun. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Components of Stock-Based Compensation Expense and Related Tax Benefits | A summary of the components of stock-based compensation expense recognized during the years ended June 30, 2020, 2019, and 2018, together with the income tax benefits realized, is as follows (in thousands):
|  | Year Ended June 30, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
Stock-based compensation included in indirect costs and selling expense: |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock and RSU expense |  | $ | 29,302 |  |  | $ | 25,272 |  |  | $ | 23,628 |
Income tax benefit recognized for stock-based compensation |  | $ | 5,849 |  |  | $ | 4,865 |  |  | $ | 7,769 |
Annual Performance-Based Awards Granted | The annual performance-based awards granted for each of the fiscal years presented were as follows:
|  | Performance-based stock awards granted |  |  | Number of additional shares earned under performance-based stock awards |
Fiscal year 2020 |  |  | 108,844 |  |  |  | — |
Fiscal year 2019 |  |  | 129,108 |  |  |  | 5,874 |
Fiscal year 2018 |  |  | 185,056 |  |  |  | 51,808 |
Summary of Activity Related to Restricted Stock and RSUs | Changes in the number of unvested restricted stock and RSUs during each of the years in the three-year period ended June 30, 2020, 2019, and 2018, together with the corresponding weighted-average fair values, are as follows:
|  | Restricted Stock and Restricted Stock Units |
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Unvested at June 30, 2017 |  |  | 834,607 |  |  | $ | 71.20 |
Granted |  |  | 276,871 |  |  |  | 146.27 |
Vested |  |  | (394,293 | ) |  |  | 66.29 |
Forfeited |  |  | (53,198 | ) |  |  | 95.03 |
Unvested at June 30, 2018 |  |  | 663,987 |  |  | $ | 107.96 |
Granted |  |  | 274,261 |  |  |  | 201.27 |
Vested |  |  | (276,626 | ) |  |  | 61.85 |
Forfeited |  |  | (32,816 | ) |  |  | 123.55 |
Unvested at June 30, 2019 |  |  | 628,806 |  |  | $ | 134.10 |
Granted |  |  | 271,542 |  |  |  | 252.25 |
Vested |  |  | (348,897 | ) |  |  | 77.33 |
Forfeited |  |  | (49,528 | ) |  |  | 181.89 |
Unvested at June 30, 2020 |  |  | 501,923 |  |  | $ | 173.18 |
Summary of Activity Related to MSPP | Activity related to the MSPP during the year ended June 30, 2020 is as follows:
|  | MSPP |
RSUs outstanding, June 30, 2019 |  |  | 2,921 |
Granted |  |  | 1,805 |
Issued |  |  | (2,473 | )
Forfeited |  |  | (30 | )
RSUs outstanding, June 30, 2020 |  |  | 2,223 |
Weighted average grant date fair value as adjusted for the applicable discount |  | $ | 159.36 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested performance-based units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of employee stock purchase plan activity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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