Acquisition - Unaudited proforma results of operations assume the Six3 Systems acquisition (Details 1) (Six3 Systems Holdings II Inc, USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Six3 Systems Holdings II Inc
Business Acquisition [Line Items]
Revenue	$ 1,936,283	$ 2,072,832
Net income	$ 82,224	$ 73,635
Basic earnings per share (in dollars per share)	$ 3.52	$ 3.21
Diluted earnings per share (in dollars per share)	$ 3.28	$ 3.10