Acquisitions (2012 Narrative) (Details) (USD $)	12 Months Ended						12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended
	Jun. 30, 2012 entity M Y	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2012 PSB Informatiesystemen BV [Member]	Jun. 30, 2012 Tomorrow Communications LTD [Member]	Feb. 01, 2012 Tomorrow Communications LTD [Member]	Jun. 30, 2012 Advanced Programs Group LLC [Member]	Jun. 30, 2011 Advanced Programs Group LLC [Member]	Jun. 30, 2012 Paradigm Holdings Inc [Member]	Jun. 30, 2011 Paradigm Holdings Inc [Member]	Jun. 30, 2012 Pangia Technologies, LLC [Member]	Jun. 30, 2011 Pangia Technologies, LLC [Member]	Jun. 30, 2012 United States [Member]	Jun. 30, 2011 United States [Member]	Jun. 30, 2010 United States [Member]	Jun. 30, 2011 United Kingdom [Member]	Jun. 30, 2010 United Kingdom [Member]	Jun. 30, 2012 Europe [Member]	Jun. 30, 2011 Customer Contracts [Member] Y	Jun. 30, 2011 Customer Relationships [Member] Y	Jun. 30, 2011 Noncompete Agreements [Member] Y
Number of entities acquired	5	3	3										3	2	2	1	1	2
Date of acquisition				May 25, 2012	February 1, 2012		October 3, 2011		September 1, 2011		July 1, 2011
Ownership percentage of parent				100.00%	100.00%			100.00%		100.00%		100.00%
Total purchase consideration	$ 199,053,000	$ 134,600,000	$ 129,100,000
Initial purchase consideration		187,100,000
Initial purchase consideration deposited into escrow		10,000,000
Indemnification obligation		2,400,000
Additional purchase consideration paid		6,100,000			6,200,000
Business acquisition, contingent consideration, at fair value			3,100,000			5,900,000
Amortization period, minimum (in years)	12																		4	4	4
Amortization period, maximum (in years)	120																		15	10	10
Weighted average amortization period (in years)	10
Revenue from acquired entities		$ 89,600,000