Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Income Statement [Abstract]
Service revenue	$ 355,992	$ 301,396	$ 1,003,897	$ 901,575
Reimbursement revenue	56,037	51,565	156,592	157,693
Total revenue	412,029	352,961	1,160,489	1,059,268
Direct costs	241,445	195,605	691,718	584,738
Reimbursable out-of-pocket expenses	(56,037)	(51,565)	(156,592)	(157,693)
Selling, general and administrative	67,159	67,700	192,506	189,740
Depreciation	15,166	13,582	44,199	40,438
Amortization	2,198	2,500	6,542	7,408
Restructuring charge (benefit)	(1,807)	(144)	(5,669)	818
Total costs and expenses	383,812	331,096	1,097,226	979,199
Income from operations	28,217	21,865	63,263	80,069
Investment Income, Interest	1,250	1,211	4,009	3,616
Interest expense	(3,152)	(3,699)	(9,598)	(11,881)
Miscellaneous (expense) income	(4,373)	(4,515)	(2,856)	(14,526)
Other expense	(6,275)	(7,003)	(8,445)	(22,791)
Income before income taxes	21,942	14,862	54,818	57,278
Provision for income taxes	(927)	(872)	9,448	6,921
Net income	$ 22,869	$ 15,734	$ 45,370	$ 50,357
Earnings per common share
Basic	$ 0.38	$ 0.27	$ 0.76	$ 0.86
Diluted	$ 0.38	$ 0.26	$ 0.75	$ 0.84
Shares used in computing earnings per common share
Basic	59,652	58,673	59,319	58,545
Diluted	60,494	59,808	60,272	59,717