Condensed Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	$ (12,200)	$ (30,800)	$ (27,200)	$ (68,900)
Revenues [Abstract]
Service revenue	518,500	499,300	1,030,600	991,000
Reimbursement revenue	85,700	75,700	158,800	157,700
Total revenue	604,200	575,000	1,189,400	1,148,700
Costs and Expenses [Abstract]
Direct costs	332,500	327,300	675,700	646,100
Reimbursable out-of-pocket expenses	85,700	75,700	158,800	157,700
Selling, general and administrative	97,400	98,800	192,300	197,800
Depreciation	17,900	16,800	35,900	33,700
Amortization of Intangible Assets	5,700	3,600	11,400	7,100
Restructuring charge (benefit)	10,400	0	25,200	(100)
Total costs and expenses	549,600	522,200	1,099,300	1,042,300
Income from operations	54,600	52,800	90,100	106,400
Interest Income (Expense), Net	(2,100)	(1,900)	(3,700)	(3,600)
Miscellaneous income (expense)	(100)	3,000	1,700	6,300
Total other income (expense)	(2,200)	1,100	(2,000)	2,700
Income before income taxes	52,400	53,900	88,100	109,100
Provision for income taxes	13,000	15,100	23,800	33,200
Net income	$ 39,400	$ 38,800	$ 64,300	$ 75,900
Earnings per common share
Basic	$ 0.74	$ 0.71	$ 1.19	$ 1.39
Diluted	$ 0.73	$ 0.70	$ 1.17	$ 1.36
Shares used in computing earnings per common share
Basic	53,300	54,800	54,100	54,800
Diluted	54,000	55,700	54,900	55,700