Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Service revenue	$ 422,068	$ 333,170	$ 816,821	$ 647,905
Reimbursement revenue	61,069	54,641	128,836	100,555
Total revenue	483,137	387,811	945,657	748,460
Direct costs	301,325	228,099	580,729	450,273
Reimbursable out-of-pocket expenses	(61,069)	(54,641)	(128,836)	(100,555)
Selling, general and administrative	71,909	64,358	141,937	125,347
Depreciation	15,462	14,752	30,257	29,033
Amortization of Intangible Assets	2,043	2,203	3,127	4,344
Restructuring (benefit) charges	(108)	1,162	(418)	3,862
Total costs and expenses	451,700	365,215	884,468	713,414
Income from operations	31,437	22,596	61,189	35,046
Investment Income, Interest	1,027	1,606	2,134	2,760
Interest expense	(2,428)	(2,687)	(4,971)	(6,446)
Miscellaneous income (expense)	1,192	(2,713)	240	1,516
Total other expense	(209)	(3,794)	(2,597)	(2,170)
Income before income taxes	31,228	18,802	58,592	32,876
Provision for income taxes	9,885	5,862	22,185	10,375
Net income	21,343	12,940	36,407	22,501
Earnings per common share
Basic	$ 0.36	$ 0.22	$ 0.61	$ 0.38
Diluted	$ 0.36	$ 0.21	$ 0.60	$ 0.37
Shares used in computing earnings per common share
Basic	58,671	59,265	59,391	59,154
Diluted	59,639	60,249	60,412	60,164
Statement [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 27,621	$ 1,064	$ 56,557	$ (22,795)