Consolidated Statements Of Income and Comprehensive Income - Scenario, Unspecified [Domain] - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]
Service revenue	$ 2,015,981	$ 1,939,360	$ 1,734,442
Reimbursement revenue	314,293	326,982	261,524
Total revenue	2,330,274	2,266,342	1,995,966
Costs and expenses:
Direct costs	1,344,153	1,279,178	1,207,536
Reimbursable out-of-pocket expenses	314,293	326,982	261,524
Selling, general and administrative	367,192	379,800	318,806
Depreciation	69,321	66,376	63,187
Amortization	15,618	14,952	9,999
Restructuring charge (benefit)	19,845	(444)	(1,209)
Total costs and expenses	2,130,422	2,066,844	1,859,843
Income from operations	199,852	199,498	136,123
Interest expense, net	(7,009)	(9,088)	(7,238)
Miscellaneous expense, net	7,387	(2,549)	4,265
Total other expense, net	378	(11,637)	(2,973)
Income before provision for income taxes	200,230	187,861	133,150
Provision for income taxes	52,409	58,767	37,178
Net income	$ 147,821	$ 129,094	$ 95,972
Weighted average shares:
Basic	54,915	56,504	58,388
Diluted	55,838	57,477	59,447
Earnings per share:
Basic	$ 2.69	$ 2.28	$ 1.64
Diluted	$ 2.65	$ 2.25	$ 1.61
Net income	$ 147,821	$ 129,094	$ 95,972
Unrealized (loss) gain on derivative instruments, net of taxes	(3,883)	5,078	624
Foreign currency translation adjustment	(94,075)	27,050	(1,523)
Total comprehensive income	$ 49,863	$ 161,222	$ 95,073