Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Cash and Cash Equivalents, at Carrying Value	$ 213,579,000	$ 89,056,000
selling general and administrative expenses reclassified to direct costs		11,900,000	7,200,000
Investigator fees	250,800,000	185,500,000	200,900,000
Percentage of consolidated service revenue attributable to largest client	9.00%	9.00%	8.00%
Number of counterparties in derivative contracts	5
Research and development expense	21,000,000	23,000,000	21,000,000
Transaction (losses) gains	300,000	(10,400,000)	(2,500,000)
Goodwill	255,455,000	262,313,000	248,226,000
Prepaid Expense and Other Assets, Current		10,500,000
Buildings [Member]
Estimated useful lives, years	P40Y
Office Furniture, Fixtures And Equipment [Member]
Estimated useful lives, years	P5Y
CRS [Member]
Goodwill	126,100,000
PCMS [Member]
Goodwill	4,500,000
Perceptive [Member]
Goodwill	$ 124,900,000
Minimum [Member] | Computer Software And Hardware [Member]
Estimated useful lives, minimum, years	3 years
Maximum [Member] | Computer Software And Hardware [Member]
Estimated useful lives, years	P8Y