Stock-Based Compensation (Tables)

9 Months Ended

Mar. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of stock-based compensation expense recognized

	Three Months Ended				Nine Months Ended
	March 31,				March 31,
	2016		2015		2016		2015
Total stock-based compensation related to RSUs    included in indirect costs and selling expense	$	4,856	$	3,857	$	13,329	$	10,051
Income tax benefit recognized for stock-based    compensation expense	$	1,719	$	1,378	$	4,897	$	3,737

Schedule of activity related to SSARs/non-qualified stock options and RSUs

	SSARs/ Non-qualified Stock Options			RSUs
Outstanding, June 30, 2015		42,660			864,566
Granted		—			270,767
Exercised/Issued		(35,860	)		(189,105	)
Forfeited/Lapsed		(6,800	)		(39,256	)
Outstanding, March 31, 2016		—			906,972
Weighted-average grant date fair value for RSUs				$	80.42