Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	$ 16,500	$ 8,400	$ (5,700)	$ (18,800)
Revenues [Abstract]
Service revenue	529,300	527,100	1,560,400	1,557,700
Reimbursement revenue	75,900	84,300	233,500	243,100
Total revenue	605,200	611,400	1,793,900	1,800,800
Costs and Expenses [Abstract]
Direct costs	349,600	337,800	1,028,200	1,013,500
Reimbursable out-of-pocket expenses	75,900	84,300	233,500	243,100
Selling, general and administrative	100,800	97,100	288,600	289,400
Depreciation	20,100	18,400	58,500	54,300
Amortization of Intangible Assets	7,300	5,900	20,000	17,300
Restructuring charge (benefit)		(1,800)	21,900	23,400
Total costs and expenses	575,300	541,700	1,650,700	1,641,000
Income from operations	29,900	69,700	143,200	159,800
Interest Income (Expense), Net	(3,100)	(2,300)	(8,500)	(6,000)
Miscellaneous income (expense)	(2,200)	(300)	(20,700)	1,400
Total other income (expense)	(5,300)	(2,600)	(29,200)	(4,600)
Income before income taxes	24,600	67,100	114,000	155,200
Provision for income taxes	6,800	19,200	36,600	43,000
Net income	$ 17,800	$ 47,900	$ 77,400	$ 112,200
Earnings per common share
Basic	$ 0.35	$ 0.91	$ 1.49	$ 2.09
Diluted	$ 0.35	$ 0.89	$ 1.47	$ 2.06
Shares used in computing earnings per common share
Basic	50,500	52,900	51,800	53,700
Diluted	51,200	53,600	52,600	54,500