Summary Of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Jun. 30, 2012 Y	Jun. 30, 2011
Percent of total revenue subject to subsequent government audit of direct and indirect costs	94.50%
Material adjustment for audits not completed on revenue recognition	Management does not anticipate any material adjustment to the consolidated financial statements in subsequent periods for audits not yet started or completed.
Percentage goodwill attributable to domestic operations	94.00%
Common stock, shares authorized	80,000,000	80,000,000
Accumulated other comprehensive loss related to foreign currency translation adjustments	$ 5,500,000	$ 2,400,000
Accumulated other comprehensive loss related to unrecognized post-retirement medical plan costs	1,000,000	700,000
Convertible notes payable	$ 300,000,000	$ 300,000,000
Convertible senior subordinated notes, stated interest rate	2.125%
Maximum estimated useful life (in years)	8
Minimum estimated useful life (in years)	3
Warrants [Member]
Exercise price of shares issued under warrants	$ 68.31
Common stock, shares authorized	5,500,000