Goodwill and Intangible Assets (Details1) (USD $)	12 Months Ended						12 Months Ended										3 Months Ended
	Jun. 30, 2012 years	Jun. 30, 2011 years	Jun. 30, 2010	Jun. 30, 2012 Intangible Assets, Amortization Period [Member]	Jun. 30, 2012 Trade Names years	Jun. 30, 2010 Trade Names	Jun. 30, 2012 Customer related intangibles years	Jun. 30, 2011 Customer related intangibles years	Jun. 30, 2012 Core/developed technology years	Jun. 30, 2011 Core/developed technology years	Jun. 30, 2012 Non-compete agreements years	Jun. 30, 2011 Non-compete agreements years	Jun. 30, 2012 Favorable lease agreements years	Jun. 30, 2011 Favorable lease agreements years	Jun. 30, 2012 Unfavorable lease agreements years	Jun. 30, 2011 Unfavorable lease agreements years	Dec. 31, 2011 Fifth Quadrant [Member]
Business Combination Step Acquisition [Line Items]
Goodwill acquired	$ 377,643,000	$ 101,110,000															$ 27,700,000
Effective date of the step acquisition																	2011-11-30
Business Acquisition achieved in stages, Gain (Loss) Recognized																	2,800,000
Finite-Lived Intangible Assets [Line Items]
Balance as of	321,360,000	316,694,000			0	0	202,155,000	188,806,000	113,767,000	118,726,000	0	0	5,438,000	9,162,000
Intangible assets acquired during the period	150,717,000	45,452,000			370,000		123,150,000	27,396,000	26,660,000	17,806,000		250,000	537,000
Intangible assets disposed during the period	(508,000)	(1,376,000)											(508,000)	(1,376,000)
Amortization	(65,619,000)	(52,114,000)	(31,400,000)		(370,000)		(28,318,000)	(29,081,000)	(36,931,000)	(22,603,000)		(250,000)
Rent expense for lease intangible													(851,000)	(2,622,000)
Total intangible amortization and rent expense	66,470,000	54,556,000
Translation adjustment	(7,735,000)	15,146,000					(7,466,000)	15,034,000	(207,000)	(162,000)			(62,000)	274,000
Balance as of	397,364,000	321,360,000	316,694,000		0	0	289,521,000	202,155,000	103,289,000	113,767,000		0	4,554,000	5,438,000
Finite-Lived Intangible Assets [Abstract]
Gross Carrying Amount	570,757,000	454,990,000			370,000		390,264,000	280,547,000	173,498,000	166,110,000	0	1,525,000	6,625,000	6,808,000
Accumulated Amortization	173,393,000	133,630,000			370,000		100,743,000	78,392,000	70,209,000	52,343,000	0	1,525,000	2,071,000	1,370,000
Weighted average remaining life of amortizable intangible assets	7.1	8.1					8.0	9.4	4.3	6.0			5.6	6.3
Intangible Lease Liability Gross															27,670,000	27,833,000
Intangible Lease Liability Accumulated Amortization															10,707,000	6,498,000
Weighted average remaining life of intangible lease liability															4.8	6.3
Change in Accounting Estimate [Line Items]
Change in Accounting Estimate, Description	Due to integration of our Retirement practice, management decided to discontinue the use of an application that was acquired in the Merger with an expected useful life of ten years. We calculated no impairment and we plan to shorten the life of the intangible asset and accelerate the amortization in the same pattern in which our clients are transitioned to the surviving application, which is expected to occur over the next three to four years. To develop our estimated useful remaining life of the application, we are using client engagement revenue and the planned transition developed by our practice management.
Change In Accounting Estimate Period Charge				8,400,000
Intangible Assets Other Disclosures [Abstract]
Finite-Lived Intangible Assets, Amortization Expense	65,619,000	52,114,000	31,400,000		370,000		28,318,000	29,081,000	36,931,000	22,603,000		250,000
Indefinite-Lived Intangible Assets (Excluding Goodwill)	371,400,000	373,600,000
Intangible Lease Liability	17,000,000	21,300,000
Reduction to rent expense	(4,200,000)
Lease Liability Translation	100,000
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2013	78,383,000
2014	72,462,000
2015	60,617,000
2016	51,540,000
2017	43,113,000
Thereafter	86,695,000
Total	392,810,000
Future Amortization Rent Offset [Abstract]
2013	(2,529,000)
2014	(2,305,000)
2015	(1,980,000)
2016	(1,578,000)
2017	(1,854,000)
Thereafter	(2,164,000)
Total	$ (12,410,000)