Stock-Based Compensation (Tables)

6 Months Ended

Dec. 31, 2015

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

Schedule of stock-based compensation expense recognized

	Three Months Ended				Six Months Ended
	December 31,				December 31,
	2015		2014		2015		2014
Total stock-based compensation related to RSUs included    in indirect costs and selling expense	$	4,835	$	3,574	$	8,473	$	6,194
Income tax benefit recognized for stock-based    compensation expense	$	1,734	$	1,312	$	3,177	$	2,346

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		—			264,807
Exercised/Issued		(35,860	)		(78,078	)
Forfeited/Lapsed		(6,800	)		(28,223	)
Outstanding, December 31, 2015		—			1,023,072
Weighted-average grant date fair value for RSUs				$	80.16