Stock-Based Compensation (Tables)

9 Months Ended

Mar. 31, 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				Nine Months Ended
	March 31,				March 31,
	2018		2017		2018		2017
Stock-based compensation related to RSUs included in    indirect costs and selling expense	$	5,794	$	5,557	$	18,183	$	16,114

Summary of Activity Related to RSUs

Activity related to RSUs during the nine months ended March 31, 2018 is as follows:

	RSUs
Unvested at June 30, 2017		834,607
Granted		269,898
Vested		(378,007	)
Forfeited		(44,090	)
Unvested at March 31, 2018		682,408
Weighted-average grant date fair value for RSUs	$	145.94