STOCK PLANS AND STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Jun. 30, 2019

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, 2019, 2018, and 2017, together with the income tax benefits realized, is as follows (in thousands):

	Year Ended June 30,
	2019		2018		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

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 2019		129,108		—
Fiscal year 2018		185,056		20,116
Fiscal year 2017		193,420		73,065

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, 2019, 2018, and 2017, 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, 2016		873,854		$	64.79
Granted		256,853			104.45
Vested		(233,296	)		65.07
Forfeited		(62,804	)		93.12
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

Summary of Activity Related to MSPP

Activity related to the MSPP during the year ended June 30, 2019 is as follows:

	MSPP
RSUs outstanding, June 30, 2018		3,938
Granted		1,560
Issued		(691	)
Forfeited		(1,886	)
RSUs outstanding, June 30, 2019		2,921
Weighted average grant date fair value as adjusted for the applicable discount	$	125.82