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Stock-Based Compensation | 3 Months Ended
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Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock-Based Compensation |
11. | Stock-Based Compensation
Stock-based compensation expense recognized, together with the income tax benefits recognized, is as follows (in thousands):
|  | Three Months Ended |
|  | September 30, |
|  | 2018 |  |  | 2017 |
Stock-based compensation related to RSUs included in indirect costs and selling expense |  | $ | 5,698 |  |  | $ | 6,351 |
Income tax benefit recognized for stock-based compensation expense |  | $ | 749 |  |  | $ | 1,587 |
Under the terms of the 2016 Amended and Restated Incentive Compensation Plan (the 2016 Plan), the Company may issue, among others, non-qualified stock options, restricted stock, RSUs, SSARs, and performance awards, collectively referred to herein as equity instruments. The 2016 Plan was approved by the Company’s stockholders in November 2016 and amended and restated the 2006 Stock Incentive Plan (the 2006 Plan) which was due to expire at the end of the ten-year period. Previous grants that were made under the 2006 Plan, and equity instruments granted prior to approval of the 2016 Plan continue to be governed by the terms of the 2006 Plan. During the periods presented all equity instrument grants were made in the form of RSUs. Other than performance-based RSUs (PRSUs) which contain a market-based element, the fair value of RSU grants was determined based on the closing price of a share of the Company’s common stock on the date of grant. The fair value of RSUs with market-based vesting features was also measured on the grant date, but was done so using a binomial lattice model. Annual grants under the 2016 Plan, and previously the 2006 Plan, are generally made to the Company’s key employees during the first quarter of the Company’s fiscal year and to members of the Company’s Board of Directors during the second quarter of the Company’s fiscal year. With the approval of its Chief Executive Officer, the Company also issues equity instruments to strategic new hires and to employees who have demonstrated superior performance. The Company granted performance-based stock awards to key employees in September of 2017, 2016, and 2015. The final number of PRSUs that are earned by participants and vest is based on the achievement of a specified EPS for the fiscal year and on the average share price for the 90-day period ended for the following three years. If the 90-day average share price of the Company’s stock in years one, two and three exceeds the 90-day average share price at the grant date by 100 percent or more the number of shares ultimately awarded could range up to 200 percent of the specified target award. In addition to the performance and market conditions, there is a service vesting condition that stipulates 50 percent of the award will vest approximately three years from the grant date and 50 percent will vest approximately four years from the grant date, depending on the award date. 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 2018 |  |  | 185,056 |  |  |  | 20,116 |
Fiscal year 2017 |  |  | 193,420 |  |  |  | 73,065 |
Fiscal year 2016 |  |  | 208,160 |  |  |  | 110,944 |
As of September 30, 2018, the total number of shares authorized by shareholders for grants under the 2016 Plan and its predecessor plan is 1,200,000 plus any forfeitures from the 2006 Plan. The aggregate number of grants that may be made may exceed this approved amount as forfeited RSUs become available for future grants. As of September 30, 2018, cumulative grants of 429,635 equity instruments underlying the shares authorized have been awarded, and 114,881 of these instruments have been forfeited. Activity related to RSUs during the three months ended September 30, 2018 is as follows:
|  | RSUs |
Unvested at June 30, 2018 |  |  | 663,987 |
Granted |  |  | 111,008 |
Vested |  |  | (231,700 | )
Forfeited |  |  | (9,514 | )
Unvested at September 30, 2018 |  |  | 533,781 |
Weighted-average grant date fair value for RSUs |  | $ | 187.90 |
As of September 30, 2018, there was $31.7 million of total unrecognized compensation costs related to RSUs scheduled to be recognized over a weighted-average period of 2.5 years.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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