Stock-Based Compensation (Tables)

6 Months Ended

Dec. 31, 2017

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				Six Months Ended
	December 31,				December 31,
	2017		2016		2017		2016
Stock-based compensation related to RSUs included in    indirect costs and selling expense	$	6,038	$	5,660	$	12,389	$	10,557

Summary of Activity Related to RSUs

Activity related to RSUs during the six months ended December 31, 2017 is as follows:

	RSUs
Unvested at June 30, 2017		834,607
Granted		269,631
Vested		(256,589	)
Forfeited		(27,161	)
Unvested at December 31, 2017		820,488
Weighted-average grant date fair value for RSUs	$	145.94