Consolidated Statements Of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Sales Revenue, Services, Net	$ 1,939,360	$ 1,734,442	$ 1,396,508
Reimbursement revenue	326,982	261,524	221,726
Total revenue	2,266,342	1,995,966	1,618,234
Costs and expenses:
Direct Operating Costs	1,279,178	1,207,536	971,829
Cost of Reimbursable Expense	326,982	261,524	221,726
Selling, General and Administrative Expense	379,800	318,806	263,462
Depreciation	66,376	63,187	57,419
Amortization	14,952	9,999	8,753
Restructuring charge (benefit)	(444)	(1,209)	6,243
Total costs and expenses	2,066,844	1,859,843	1,529,432
Income from operations	199,498	136,123	88,802
Interest expense	(9,088)	(7,238)	(7,003)
Miscellaneous expense, net	(2,549)	4,265	(2,093)
Total other expense, net	(11,637)	(2,973)	(9,096)
Income before provision for income taxes	187,861	133,150	79,706
Provision for income taxes	58,767	37,178	16,548
Net Income (Loss) Attributable to Parent	129,094	95,972	63,158
Weighted average shares:
Basic	56,504	58,388	59,464
Diluted	57,477	59,447	60,426
Earnings per share:
Basic	$ 2.28	$ 1.64	$ 1.06
Diluted	$ 2.25	$ 1.61	$ 1.05
Comprehensive Income
Net Income (Loss) Attributable to Parent	129,094	95,972	63,158
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	5,078	624	(1,660)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	27,050	(1,523)	(46,334)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 161,222	$ 95,073	$ 15,164