Stock-Based Compensation (Tables)

3 Months Ended

Sep. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense and Related Tax Benefits Recognized

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

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 2018		185,056		20,116
Fiscal year 2017		193,420		73,065
Fiscal year 2016		208,160		110,944

Summary of Activity Related to RSUs

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